[n8m]

I completely agree with that! I know so many people coding ridiculous hours, and all they do is causing more problems the next day. Less hours = Better focus

Plan your food and sleep. Probably exercise. Get a fitbit (or similar) and find your sweet spot (sleep tracking is awesome with those things). When you feel good- you're most effective.

If you're having deadlines, take long breaks and go back to work after you've done something different (essentially shift working but within reasonable hours).

Don't "overdose" yourself with energy drinks, or too much coffee/tea. I have found that some energy drinks do affect my ability to focus negative. Same with coffee- too much is limiting (my) ability to focus.

All those things helped me. It can be different for you, but it's probably a start.