Plain old water for me. On a very hot day, i will take one bottle with 50% orange juice and 50% water to which I add half a teaspoon of salt to ward off cramp. No special meals either - although if it's a Saturday ride, carb loading might involve a Curry House :-) Food on the day will often involve whatever cake is being sold at the cafe/shop we stop at (and bacon rolls). I do carry an energy bar on my saddle bag for emergencies though.
I've found the key to be not so much what you eat or drink, but when. Eat before you're hungry and drink before you're thirsty.