Say no to what you don't have time for or what isn't interesting
Leave work early (or at least on time)
Relax your demands on yourself a bit ‚ most of us expect too much
Let yourself ask questions and communicate with co-workers
Do unpleasant tasks in the morning to get them over with.
Simplify things whenever possible. Look at large, overwhelming projects as a series of steps you complete one at a time.
Let yourself laugh, especially when you feel grumpiest.
Live in the present--don't spend time worrying about how much better things were in the past or what might happen in the future. Most people who are able to manage stress have perfected the art of living in the now.