I have seen a signifigant decrease in my fibromyalgia since I started Paleo 3-months ago (scale of 9 down to a 4). I am now doing the Whole30 to see if I can impact the inflamation I have developed in my body over the last year that is causing some new skin issues and further reduce if not rid my body of the fibromyalgia once and for all after 15 long years!
I also found that Boot Camp (Cross Fit) really helps as does working with a foam roller. While sometimes it is really hard to do because it hurts, it has been really fantastic and a huge help! Most gyms have them in the stretch area. There are some great how-to stretching/rolling videos on YouTube. You can also get one online to have at home. They are pretty cheap: http://amzn.com/B0040NJOA0