I've been intrigued with paper piecing and have been expermenting with it a lot lately, and with pretty good results! There are a few things I've learned:
1) it makes the trash can fill up quickly with paper and little scraps
2) you can't squeeze a piece to fit - just doesn't work
3)tearing out mistakes is not fun
4)it makes fantastic little points and odd angles look easy
5) practice makes easier
6) probably takes more fabric scraps than regularly shaped squares
7) I'm going to keep on practicing.
I found this web site that has some good ideas.