In PC Magazine's upcoming May 8th issue they have listed the top 10 most commonly used passwords online. So in case you are using any one of them change it ASAP. Having a hard time deciding on the right password, download the SecurePassword Generator plug in for Firefox.
(List after the jump)

List
1. password
2. 123456
3. qwerty
4. abc123
5. letmein
6. monkey
7. myspace1
8. password1
9. blink182
10. (your first name)