Well, the title explained it all. But truly. Since I rarely have this problem, I wonder how you guys actually manage this situation?
Sleep is essential and needed. However, most of the time, you just depend on your biological clock to wake you up just few hours (or minutes!) before the working hours. If things, go wrong, what would you do? Especially if you have a very important meeting. Or maybe cause it is just too early (like 1am) and you just don't wanna be awake and be alone at that time.
What do you do? Please don't say "Play Habbo". Lol.