sooo tired

What is it with me and my inability to say no? I had planned to go to bed last night @ a reasonable hour, but instead I decided to go out for beers with the boys and ended up coming home @ 3:00am....much, much too late for a Wednesday night and now I am incredibly tired. I would love to go to sleep, but i have private students for 2 hours and then dinner...shit, i just want to take a nap.