Here are a few thoughts that helps with my nervousness. Fly your simulator, and maybe fly a small electric before you leave home to go to the field? Usually if I have not flown for quite a while, I just take up my trainer or a slower flying second bird and buzz around for the first few flights. That always does the trick for me and I find my nerves are so much better. They are very docile and really sets me in the mood and to top it off I don't lose a nice plane!
I see guys come out and fly some of their most advanced aircraft after not flying for a while. That makes no sense to me, but somehow they don't have pride if they come out with a docile bird. There are times this is a huge mistake! Sometimes they hit the dirt because they have not flown in a while. It isn't worth it to me. I would rather be made fun of than have to work on a crashed plane