A lot of people are worried about getting the swine flu during the holidays. But there are things you can do to protect yourself from the H1N1 virus. State health officials say the best thing you can do is wash your hands often. Try to avoid handshakes or kissing when you greet friends or relatives. And do not share drinking glasses.  The Pima County Health Department will hold another swine flu vaccination clinic Tuesday at Tucson Electric Park. It goes from 1 p.m. to 7 p.m.