Don't take on more stress than necessary. Don't take on more work than even your boss is asking of you. (I'm talking to myself here, btw.) Don't work longer hours than expected. Don't continue working (just one more, or two, or five) after reaching the planned time limit. The limit is there for reasons. You know and have experienced those reasons. Don't work harder than it's good for you. Don't work longer than it's good for you.

Overall health status estimation: -

Alcohol recently: none since yesterday (I'm at work.)

Nicotine: none whatsoever