I stuck to pomodoro years ago while working for myself, and found it to be incredibly effective. One caveat: it doesn't work very well for more free form aspect

I stuck to pomodoro years ago while working for myself, and found it to be incredibly effective. One caveat: it doesn't work very well for more free form aspects of projects, the creative phase, etc. I no longer follow it, but the rhythm is somewhat ingrained, and I take regular breaks for context switching, etc. biggest difference is that I allow for longer stretches of productivity while being more conscious of passing the burnout point.