Don't work any more overtime than absolutely necessary. Have something fun/meaningful to do in your off hours. Be nice to people. Help people. Beyond working

Don't work any more overtime than absolutely necessary. Have something fun/meaningful to do in your off hours. Be nice to people. Help people. Beyond working {code|product}, make your work product look good, something that you enjoy looking at for looking's sake. If that's code, make it pleasant to read and easy for other professionals to understand. If you're depressed or otherwise unsettled, get professional help appropriate for whatever that is. Hmm ... that all applies to any job. :)