I stopped drinking caffeine only a week ago, and already I've noticed that I'm no longer an insomniac and that I have a much more natural rhythm to my day. By the way, this article states that chocolate provides caffeine, but chocolate actually contains theobromine, which admittedly is extremely similar to caffeine, but it isn't caffeine... just thought I'd point out that common misconception [http://www.xocoatl.org/caffeine.htm].