Imagine two kitchens. In one, a bowl of fruit sits on the counter and the biscuits are in a high cupboard. In the other, it is the other way around. Nobody in either kitchen has decided to eat differently. Still, the two households will probably end up eating differently.

This is the quiet idea behind a lot of behaviour-change research: what we do depends heavily on where we are and what is within reach.

Behaviour happens somewhere

Wood and Neal (2007) describe habits as behaviours that have become linked to a context: a place, a time of day, a previous action. Once the link exists, the context can trigger the behaviour without much conscious thought. The behaviour change wheel by Michie and colleagues (2011) makes a similar point from another angle. Behaviour needs capability, motivation and opportunity, and opportunity includes the physical surroundings.

So when a habit does not happen, "I lack discipline" is only one possible explanation. Often the honest answer is that the setup makes the healthy option harder than the alternative.

When the context changes, habits loosen

Wood, Tam and Witt (2005) followed students who transferred to a new university. Habits like exercising or reading the paper were tied to the old surroundings. When the context changed, these habits weakened and behaviour followed people's intentions more closely. When the context stayed the same, the habits kept running whatever people intended.

A related finding is the "fresh start effect". Dai, Milkman and Riis (2014) found that people are more likely to pursue goals after moments that feel like a new chapter, such as the start of a week, a month or a new year. A move, a new job or even a rearranged room can work the same way: a natural moment to set up new cues.

Two paths to the same goal: a short path with one step, and a long path with obstacles
Small differences in effort add up over hundreds of days.

Make the good option the easy one

The environment also shapes how much we do, not only what. A Cochrane review of experimental studies (Hollands et al., 2015) found that people tend to eat more when portions, packages or tableware are larger. Nobody chose that. The setup did.

You can use the same principle in the other direction. Reduce the effort of the habit you want, and add a little friction to the one you want less of.

None of these are rules. Try what fits your home and your day, and see what happens.

Try it this week

Pick one habit and take ten minutes to walk through the moment it should happen:

Then write a one-line if–then plan that uses that cue.