Write when, where, and how plans for every behavioral goal

Specify exactly when, where, and how you will act — not just what you intend to do.

Why it works

Action planning works by creating a mental link between a situational cue (when, where) and a specific behavioral response (how). When the situation occurs, the planned response is retrieved automatically without deliberation. This delegates the behavioral decision to the pre-planned response, bypassing the in-the-moment motivational and attentional barriers that cause vague intentions to fail. Gollwitzer’s implementation intention research established this mechanism consistently across domains.

How to do it

1. For each goal, write one specific action plan: "I will [behavior] at [time] in [location]."
2. Add the "how" if the behavior has multiple possible forms: "I will [specific behavior, not just category]."
3. Ensure the "when" is a specific time or event, not a vague period ("after my morning coffee" not "in the morning").
4. Write the plan, don’t just think it — writing externalizes the commitment and creates a cue you can return to.

Evidence

Implementation intention research (Gollwitzer and colleagues) shows meta-analytic effects for increasing goal attainment over control conditions, particularly for difficult or easily forgotten behaviors. (rct)

Effect sizes are moderate and shrink for very difficult goals or vague when-where specifications. The specificity of the plan is the active ingredient.

Sources

• Gollwitzer & Sheeran (2006), "Implementation intentions and goal achievement: A meta-analysis of effects and processes," Advances in Experimental Social Psychology

Common mistake

Writing an intention that sounds like a plan ("I’ll work out in the morning") without specifying the exact time, location, and form of the behavior — this is a vague intention, not an action plan.