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If-then planning: the research-backed way to actually start

By Cat, founder of ReSync · 25 October 2026 · 4 min read

Most of us don't struggle to decide what we want to do. We struggle with the moment of starting. Psychologists call the gap between intending and doing the "intention–behaviour gap", and one of the most studied ways to close it is surprisingly simple.

What an if-then plan is

An implementation intention links a specific situation to a specific action: "If it's 10am and I've made my coffee, then I'll open the report and write one sentence." Instead of relying on willpower in the moment, the decision is already made. The situation becomes the cue.

What the research found

In a meta-analysis of 94 independent tests, Gollwitzer and Sheeran (2006) found that forming implementation intentions had a medium-to-large effect on reaching goals (d = 0.65) compared with simply intending to act. The effect showed up across many areas, from health habits to study goals.

The likely reason: if-then plans hand some of the work of starting over to the environment. You don't have to remember, decide and summon energy all at once. You just notice the cue and do the first step.

Making it work on a low-energy day

• Keep the "then" tiny. "Then I'll write one sentence" or "then I'll put my shoes on". The smaller the step, the more likely you are to take it.
• Use cues that already happen. Finishing breakfast, sitting at your desk, getting home. Existing routines make reliable triggers.
• Plan for the obstacle too. "If I feel overwhelmed, then I'll do two minutes of breathing first." Planning for the hard moment makes it less likely to derail you.

How ReSync uses this

ReSync's "Make it smaller" breaks a task into small first steps you can attach to a moment in your day, and the plan suggests a realistic number of tasks for your capacity. The Companion can also help you turn something vague into three tiny, concrete steps.