Why your brain resists new habits (and the 3-day workaround)

Your brain is a prediction machine. Every new routine you attempt is, from its point of view, an unverified forecast with an uncertain payoff. That uncertainty gets taxed as friction, and friction is what you experience as 'not feeling like it'.

The workaround is to shrink the forecast. A three-day commitment is short enough that the brain does not need to model long-term cost, and long enough to generate the first evidence of reward. Once evidence exists, motivation stops being the fuel — prediction does.

Practically: pick one behaviour, define the smallest version that still counts, and run it for three days at the same time and place. On day four, keep the cue and raise the ceiling slightly. Repeat.