I learned to not stop too much and to be careful not to eat too much at the rest stops. Grap something, pee, and then get back on the bike quickly.

Also, don't stress out if you can't sleep the night before. You'll be running on adrenaline that day and you'll sleep like a baby the night after.

Regardless of how much you train, everyone seems to hit a point where dread sets in. The legs are tired, you're mentally tired and the damn thing is not over yet! For me, it was mile 80. I rode with two friends and luckily we all hit the wall at different points, so we could talk each other down.