Arthritis Bites!

I went to the doctor a few weeks ago and told him that I had some pain in my joints. He did a blood test and took x-rays of my knees. I went back to see him and he said my sed rate is up and the x-rays also showed some arthritis. I think it really bites! So now I'm on medicine for it, and I hate it. Is there any exercises that helps? I am taking vitamins that are suppose to help and most of my vitamins I take do help, but I really haven't seen any help from these. If anyone has any suggestions of exercises to try let me know.