Share 'Tennis Etiquette'

I have been reading through the pet peeves and realized, once again, how much I do not know. It would be great to those of us who are new, if the experienced players would start a list of proper "on court" etiquette. When someone serves to me and I miss or it is out, I always stop and chase down the ball. I thought I was being nice, but now realize it is the wrong thing to do. DUH! It makes perfe…