I'd post the whole thing here, but it's a big list. And I'm only allowed to link to it. :) That's a pretty good reason too. It's definitely worth a look.
http://www.suite101.com/content/developing-memorable-characters-a52915
http://www2.hn.psu.edu/faculty/jmanis/*censored*ign/e50xs2.htm
If this is against the rules, don't hesitate to tell me. I can't seem to access the rules section. Don't know why.
...the censored is a.s.s.i.g.n.
Without the dots, obviously.