Birth Control

Al
It might be a little early to be thinking about this, but I would like some opinions on the best forms of birth control. I'm 100% sure that I don't want any more children, but since I'm only 21 my doctor is reluctant to do anything too permanent. What kinds of birth control are you planning on using? I would prefer something that I don't have to remember too frequently just in case. The pill is just not an option because I already know I wouldn't be able to remember to take it at the same time everyday.