Do what you'd still want to do next week
Details:
Paul Graham says the rule “do what you love” covers more than this minute; think in week- or month-length blocks. A whole day on a beach feels great, but by day four most of us itch for something useful. That itch is the signal: pick work that stays interesting long after passive pleasures fade. You should like it enough that the idea of “spare time” sounds odd - time is just time, sometimes working, sometimes resting so the work stays sharp. If the task still draws you in after the novelty wears off, you’re on the right track.

