ADD can be an ugly beast when practicing. My first reccomendation is to check your diet. Try to eliminate any sugars that you can, and eat sensibly. I find if i undereat or overeat i get really spacey fast. I find the more protein i eat and the less carbs and the clearer i get throughout the day. Sometimes it takes a couple days to get focused though, stick at it.
I also take breaks every fifteen or ten minutes. Get up, stretch, use the bathroom, come back. Get a glass of water, come right back. Just walk arround the room, let your mind reset for a second, but make sure you dont hit the tv or computer. Just sit back down. Also dont give up.
Finding a band and getting a creative outlet helps too
