I need help with a warmup routine to get my hands and mind relaxed. I am a nervous person in general and when I start playing with others it takes time for me to get comfortable. I don't have a warm up routine and I gotta believe that is a factor that makes things worse. Particularly because if I make a mistake early it becomes a cascading effect...I get tight, my insides are out of wack, my mind goes blank, I start sweating, all that. It's like I need to run a mile or two before practice to get calm. How can I translate that to a warmup routine? Suggestions appreciated!