when you get to $500 or whatever you consider you need for yourself to play 25NL, move up. if things go bad just move back down. I just moved up to 25NL from 10NL and so far so good. I also told myself that i would not go back to 10NL unless my bankroll went below $300. my current bankroll is $560. I suggest you watch a few tables of 25NL before sitting down, just to see the amounts people bet and fold to. you will probablly also notice that the players still play the same as 10NL.

good luck
flomo