I agree with #2 wholeheartedly - drink lots of water. I use Crystal Light to cover up the flavor of "interesting" local waters, to help me drink more. That way I can buy one large bottle of water every week or so, and keep refilling it. They didn't have the little single serving packs when I was on tour, but now its much easier. There are ones you can get at dollar stores for just a buck a box. Water helps you with everything from how your joints feel to dealing with higher elevations (Denver, anyone?).
-Centaura