I do not work longer than 8 hours a day. I have a regular sleep schedule (10PM to 7AM), do strength training 3 times a week. I _try_ to eat properly, stay away from the company fridge which is stuffed with sugary drinks and beer. I try not to drink coffee after 1PM or so to not affect my sleep. I also try to not write any code after work hours, unless it's low work intensity in the office around that time.