I would say first of all read the posts on the basics of bankroll management. Do this to make sure you are playing at the right level and not over your head (could be the reason you went bust?).

The other benefit will be that you can set out some goals based on your roll if you want. The most common general guideline I've seen is to have at least 20 times the max buyin, so if you are playing $10NL you should have at least $200. At $100, you would play at a lower level than that (I don't know what levels Absolute has) until you can push your roll up to $200. Personally, that would be the goal I would shoot for, which would enable you to move up to the $10NL level. Then $500 for the $25NL games. Since I play mostly cash games, this is how my goals are... I'm always trying to improve my game and move up levels.