xptboy, Gator did a good job, imo of handling your bankroll questions. i always assume 100bb buy-ins. and i want 30 for the level i play...minimum. so, for the 2NL level thats $60. and to move up to 5NL, you need $150.

if you get it by grinding...great. if you get it through bonus $$...also great. most will tell you to stay at the level you start until you are sure you beat it handily. i will tell you that if you have the roll, take your shot at the higher level. you may be able to beat that game. but, if you do take your shot, be ready to move down if things dont go well.

when do we move down? i'm so glad you asked. i will tell you (thanks again, spenda) that its when you have 40 BIs for the lower level. so, you hit a big run and want to take a shot at 5NL, great. you should w/ $150. but, when you hit 2NL X 40...or $80, you move back to 2NL, imo. this "method" should divert playing with "scared money" allowing you to play relatively fearless poker...at your best.

i also, agree with Jib. i think, for the serious, that 300 BBs is a bit small. i have read that pros play with 500 BBs and even more. as amateurs and hobbyists, play with what you can replenish...nobody will tell you thats wrong. but, if you want to move up in stakes, correctly, you should adhere to some form of bankroll management system. read around, and make up your own mind. i gave you the system i like best.