What Do It Tomorrow and Pre-Suasion Both Decide in Advance

What each one is actually for

Do It Tomorrow

Do It Tomorrow is Mark Forster's fix for a specific failure: you sit down with a clear plan for the day, and by ten a.m. it's gone, replaced by whatever arrived most recently in your inbox, your messages, or your own head. In practice this looks like keeping two lists — today's list, which is closed the moment you start the day and cannot have anything added to it — and tomorrow's list, which is where every new task, no matter how urgent it feels when it lands, gets written down instead of acted on. A colleague pings you at 9:15 with something that feels urgent; instead of stopping what you're doing, you write it on tomorrow's list and keep going. By the next morning most of what felt urgent yesterday has either resolved itself or turned out to actually be tomorrow's problem, and the list you started today with is the one that got finished.

Pre-Suasion

Pre-Suasion, Robert Cialdini's term for a specific timing move in persuasion, is about what you put in front of someone right before you ask for something, not what you say once you're asking. In practice this looks like a fundraiser mentioning a story about generosity a few minutes before making an ask, so that generosity is already the frame in the listener's head when the request arrives, or a manager sending a short note about a project's importance the morning before asking a team member to take on extra work, rather than opening with the ask cold. The mechanism is attention, not argument: whatever is made salient in someone's mind in the moments right before a decision shapes how they interpret whatever comes next, even when the thing made salient has no logical connection to the request itself.

What you get out of pairing them

The door here is narrow but real: most people who are disciplined about protecting their own day from other people's urgency have never turned the same discipline around and used it on their own asks of other people. You already know how to refuse to improvise your response to an incoming task — that's the entire discipline of Do It Tomorrow. Pre-Suasion is what you get when you stop improvising the other side of that same transaction: instead of walking up to someone's desk and hoping the right words show up when you ask for their help, you treat the setup for that ask as a task with its own place on tomorrow's list, planned the night before, the same way you'd plan anything else you don't want to leave to whatever mood you're in when the moment arrives.

What Do It Tomorrow rests on

• Implementation intention closes intention action gap randomised trials
  Pre-committing to a specific situational cue paired with a specific response lets the behavior fire automatically when the cue occurs, without depending on in-the-moment willpower.
• Closed lists reduce overwhelm practitioner report
  A fixed bounded list of tasks rather than an ever-growing open list reduces the felt overwhelm of an infinite to-do list.
• Deferred capture protects commitment practitioner report
  Writing newly arriving tasks onto tomorrow's list rather than acting on them immediately protects today's already-committed plan from being derailed by reactivity.

What Pre-Suasion rests on

• Attention directs subsequent judgment randomised trials
  Whatever is made salient in a person's attention immediately before a decision disproportionately shapes how they interpret the choice that follows.
• Priming shifts associative framing randomised trials
  Activating a particular concept or association right before a request increases the likelihood the request is interpreted through that frame.
• Timing of influence matters more than content observational studies
  The moment just before a message is delivered can matter as much to persuasion as the content of the message itself.

Where they actually meet

Do It Tomorrow fixes a response to a cue — when a new task arrives, the response is always "write it on tomorrow's list," decided once, in advance, so it never has to be re-decided under the pressure of the moment it actually shows up in. Pre-Suasion fixes the cue itself — it decides, in advance, what will be salient in someone's mind right before an ask, so the request doesn't have to work against whatever happened to be occupying their attention that day. One practice pre-decides the response; the other pre-decides the setup the response depends on. Both are refusing to leave a load-bearing moment to whatever happens live.

The principle underneath both

A decision made calmly in advance, before the moment that would otherwise force it to be made under pressure, is more reliable than a decision made live. This holds whether the pressure is an incoming request competing for your attention or a live conversation where you're trying to think of the right thing to say while also saying it. Fix the plan ahead of the moment, and the moment itself becomes execution rather than improvisation.

What that makes the real goal

Separated from either practice's own vocabulary, the goal both are chasing is removing real-time improvisation from a moment that matters — arranging, ahead of time, either your own response or another person's frame of attention, so that what happens when the moment arrives is mostly already decided rather than assembled on the spot.

Other practices that serve the same goal

Peter Gollwitzer's broader research program on implementation intentions — the general "when situation X happens, I will do Y" format that Do It Tomorrow is one concrete instance of — carries one of the more heavily replicated effect sizes in behavior-change research, covering everything from exercise adherence to voting. On the pre-suasion side, the choice-architecture work associated with Richard Thaler and Cass Sunstein — arranging defaults and the order choices are presented in, rather than trying to argue someone into a decision after the fact — reaches for the identical timing principle: shape the moment before the choice, not the argument during it. Pre-mortems, where a team imagines a plan has already failed and works backward to why, are a third route to the same objective aimed at decisions rather than requests: deciding now what you would need to know later, instead of discovering it live.

A tradition that already does this

The oldest version of this same structure is Ulysses ordering his crew to bind him to the mast before the ship came within earshot of the Sirens. He didn't trust the decision he'd make in the moment the song was actually playing, so he made the only decision that mattered while he was still capable of making it clearly — well before the moment that would have overridden it. Both Do It Tomorrow and Pre-Suasion are quieter, everyday versions of tying yourself, or someone else's attention, to the mast ahead of time.

Put Tomorrow's Priming on Tonight's List

If you have an ask coming up that matters — asking a teammate to take on a hard piece of work, asking a partner to change something about how you split chores, asking a client to expand a contract — treat the pre-suasion setup as its own item on tomorrow's list, decided tonight rather than assembled in the doorway. Concretely: tonight, write down one specific thing you'll do a few hours before the ask that puts the right frame in the other person's head — send the article about the project's stakes, mention the win from last quarter in an unrelated conversation, ask a question that gets them thinking about their own goals before you connect those goals to your request. The point of putting it on tomorrow's list rather than trying to remember to do it is the same point Do It Tomorrow makes about everything else: a thing you plan to remember to do live usually loses to whatever else is happening live.

Stage Your Own Attention Before You Open Tomorrow's List

Pre-suasion is usually described as something you do to someone else's attention before you ask them for something, but there's no reason the same move can't be aimed at your own attention right before you sit down with tomorrow's list. The failure mode of the list method isn't writing tasks down — it's opening the list the next morning with six browser tabs already fighting for your attention, so the one hard task on the list gets skipped for the easy ones near the top. Apply the same timing principle to yourself: the night before, close everything except the one document the hard task actually needs, so the first thing in view the next morning is the thing you decided mattered, not whatever's easiest to look at. You're pre-suading tomorrow-morning-you the same way you'd pre-suade a colleague.

It's 9:15 and a message just landed that feels like it can't wait.

You sat down twenty minutes ago with three things on today's list, and a colleague has just messaged asking if you can jump on a call about something that, they say, needs to happen now. Every part of you wants to answer immediately — not answering feels like dropping something. You write it on tomorrow's list instead: "call with Priya re: vendor issue," and go back to what you were doing. That's the whole move, and it's the easy half. The harder half happened the night before, when you knew today would include asking your manager for two more days on a deadline you're behind on. Instead of walking into that conversation cold, you'd sent her a short note the previous afternoon flagging a scope change on the project — true, and also the exact frame that makes "I need two more days" land as a reasonable consequence of that change rather than a surprise. By the time you actually ask, at 2 p.m., the frame is already sitting there. You didn't have to build it live, the same way you didn't have to decide live what to do with Priya's message.

When this is worth reaching for

Two things have to both be true in the same stretch of your week: your day gets derailed by other people's urgency often enough that you need the discipline of a closed list, and you have a specific ask of someone else coming up that actually matters to the outcome — not small talk, a real request with a real cost to being refused. If either half is missing, use only the half you need.

Where this does not apply

If nothing you need from anyone is coming up, there is nothing for the pre-suasion half to do; running the list discipline alone is the whole job. And be honest about the difference between priming a frame that makes a real yes easier to give and manufacturing consent someone wouldn't otherwise freely offer — sending a colleague genuinely relevant context before an ask is fair use of this principle, and manipulating someone's mood or leaving out information that would change their answer is not this practice, whatever it's dressed up as. Do It Tomorrow also isn't a fit for anything with a real same-day deadline; deferring a task that is actually due today just moves the deadline problem to tomorrow, it doesn't solve it.

What the evidence does and does not support

The task-deferral mechanic in Do It Tomorrow overlaps closely with implementation-intention research, one of the more consistently replicated findings in behavior-change science, though the specific two-list format itself has not been tested as its own intervention — most of what supports it is practitioner reporting rather than a trial on the method by name. Pre-Suasion's attention-timing claims come mainly from Cialdini's own experiments and a body of related priming research whose replication record is mixed, stronger for some effects than others. Nothing has tested whether a person who already defers reactive tasks also gets a bigger lift from priming a request beforehand — that connection is this page's own inference from two separate literatures, not a finding either one has produced.