If it's working, keep doing it.
If it's not working, stop doing it.
If you don't know what to do, don't do anything.
That sounds too easy, but it's a good philosophy.
When frustrated by something, this little serenity exercise helps: Take a sheet of paper and draw a line down the middle. One side, write - 'What works' and on the other write - 'What doesn't works'
When we starts our lists, it's amazing how much clarity comes just in writing our thoughts.
When I'm frustrated, I'll remember to take a deep breath and give the problem some thought. I will get back to the basics of what works and what doesn't, then act accordingly.
to AH 29/3/11