General question about the PSP and what I can do with it.

Hey guys.I just got myself a PSP 3000 (3006, since I'm in Hong Kong right now, but OK), and am wondering what I can do with it (next to playing UMD's, watching videos etc.).I've only had a DS till now so I really have almost no idea about anything PSP related.I already used the search function, but it didn't help me muc.h <_<