I have never really known what to say when someone says "tell me about yourself!". I just sit there with a blank look on my face and wonder what they want to know, and what they don't. I guess the question itself gives its own answer; you can tell a lot about a person by how much they talk, and by what they talk about.
Have you ever had one of those days, where everything just seems to be going wrong? And then right when it seems to be getting better, it all just falls apart again? I think the best solution for that is some serious, heartfelt, good music. Bands that always cheer me up;