[damedley]

I presume you have a job, so saving/building a bankroll shouldn't be too much of a concern right away. The guys who are saying "make sure you have X times the blind/buy in" are getting ahead of where you are at, imo. Play at a level that is
1) Not high enough to cause you serious financial distress
2) High enough to keep your attention

note that #1 is MUCH more important than #2! Keep good records of your sessions. If you are coming out ahead you can start looking at it as a money-making endeavor. Keep playing at the same level until you have enough in your 'roll to start employing the sound money management already suggested in this forum.

If you are coming out behind, you need to look at poker as a form of entertainment and make sure you are getting your money's worth. If not, move down (home games are the best way) or quit.