[DakotaKid]

There are several schools of thought for bankroll management.

First off, do you even need a bankroll? If you have other sources of income where blowing several hundred dollars won't keep you out of next week's game you pretty much just need enough to get you through a bad night.

If you want to never go bust based on your bankroll, there are some pretty basic statistical calculations you can use to approximate your required bankroll to some confidence (just do a google search). The trick here is that you will never be sure that you won't go broke, and all these calculations assume you never withdraw money from your bankroll. The other trick to this is that you need a pretty accurate guess to your win rate and your standard deviation. These numbers generally take a very long time to converge, especially in live games.

That said, the typical suggestions I've seen for no limit play is 20-30 buy-ins, and 300 big bets for limit games. More or less if you play a particularly high or low variance game.