Just remember that most of the research done that has established our need for sports drinks has been paid for by the sports drink makers.

Water water water - your thirst will generally tell you when you need to drink, and if you find with experience (we are each an experiment of population ONE) you need to schedule your drinking, then use your watch. Personally, I find if I can drink enough that I occasionally need to take a leak, I'm about right.

And chocolate milk is a great recovery drink - just about the right mix of protein and carbs, tastes great, and is cheaper than the sports drinks. Last year my favorite ride had chocolate milk at all the rest stops and at the lunch after the ride. Danged near OD'd on the stuff, was almost like I was in grade school again what with a bike and chocolate milk!