My daughter was diagnosed with ADHD and anxiety awhile ago. It's a really hard condition to have. Both for the kids and the parents.
We tried Sensory Integration Therapy at first. This was really a play session that only wore her out. There were a number of books that I read and the basic themes were that if you can get more oxygen flowing to the brain it helps the focus issues.
Here are a few things that work for us...
1 - Boundaries, not confinement. My daughter knows what her boundaries are but we do not confine her movements. Ex. Homework is always done right when she gets home from school, but if she needs to do a few sommersaults in-between problems, then that's allowed.
2 - Breathing - practice taking deep breaths and letting them out slowly.
3 - Medication, she is taking Focalin XR - this medicine clears the cobwebs and helps her to focus, especially in school, without drugging her up.
4 - We tried things at home like, having a mini trampoline or treadmil. It stays in the basement, sometimes the garage for when she just needs to get some energy out.
I hope that helps, I'm more than happy to chat if you think it might help.
T.