recently i got some hammergel and the little flask. today i did 55 miles and hit the gel flask about every 30 minutes. i felt so good at the end, like i could just keep going. i was also very well hydrated today. keeping fuel and fluids going in is critical on longer rides.
drink up the water tonight, and in the morning down a water bottle right when you get up. eat a good but not huge breakfast and take along something else (real food, like a piece of fruit or a couple fig newtons or something)