Impose a deliberate constraint

Add an artificial limit (a rule, a shape, a forbidden option) to block the obvious path.

Why it works

Without constraints the mind reaches for the most familiar, lowest-effort solution and stops. A deliberate constraint removes that default, so the search has to continue into less-traveled regions where more original ideas live. The limit does the work of forcing exploration that motivation alone usually won’t.

How to do it

1. Pick one real limit for the task: a form, a forbidden tool, a rule it must obey.
2. Make the constraint block the obvious solution, not just decorate the task.
3. Solve within the limit first; relax it only if it proves genuinely unworkable.

Evidence

There is real experimental and review evidence that input or task constraints can increase the novelty of ideas by preventing reliance on the most accessible default. Stated at the level of the general finding rather than a single number. (observational)

Effects depend on the type and amount of constraint, and findings are mixed in detail; the robust claim is directional, not a precise effect size.

Common mistake

Choosing a cosmetic constraint that doesn’t actually block the obvious answer, so the mind still takes the default path and the limit changes nothing.