I take Ginseng, Ginko Buliba, and Omega 3 supplements. They aren't really doing too much for me, but I figure they all work well with my Centrum vitamin every day to increase its effectiveness.
64oz of water isn't too hard to do to reach the 8 glasses mark.

Most people should be able to hit 40-50oz of water fairly easily by just carrying around some old bottle that had some Gatorade in it and filling with water. I can down one of those without thinking about it by lunchtime sipping every half hour or so.