Keep at the computer. It can be great at keeping your mind occupied when it's fragmented. You can just look at whatever you want and it stops my irritation. Books, films, music are all too slow when I'm manic. But the net can go as fast as I can. I also paint. That really absorbs all the craziness too. It really helps me focus and is very satisfying. Mind you, the pictures are all a bit disturbing!