Every person is different, especially with psychoactive drugs and such sensitive conditions as add/adhd. The proper way to approach the issue is to talk to a professional and experiment with different treatments under close supervision.
Attention-deficit hyperactivity disorder - Wikipedia, the free encyclopedia is a good place to start in terms of useful information.
From a personal standpoint, I've been switching from a very small dose of ritalin, to large amounts of coffee, while maintaining continuous exercise routine for a little over a year - about the time when I realized how I was different from those around me. But I think that being actively aware of my condition was what really put me back on track in life. Good luck.