I agree with everyone above. I also do some yoga poses, twists are nice and cobblers pose:

http://www.yogajournal.com/poses/486_1.cfm

There are also very effective acupuncture points that you can massage or have someone else massage like Spleen 6 and UB 23:

In this diagram they mislabled SP6 as SP 5. But its a good diagram for finding the point.

http://images.google.com/imgres?imgu...%3D1%26hl%3Den

SP 6 is best used by massaging it daily for the entire week prior to getting your period and daily while you're having your period.

This is UB 23. You have to scroll through to find it.

http://images.google.com/imgres?imgu...%3Den%26sa%3DG

Hope that helps.