Move to 10nl

Ya move up, ya move down, sometimes you don't move down, sometimes you keep moving up. It's still NLHE. It's still micro, and they all suck. Just keep working at not sucking. When your beating 100NL's there is no difference between $4NL and $25NL. Just keep learning and killing. play the stakes you beat and keep trying to beat the next one. You will be surprised how easy 10NL is after a failed attempt at $25NL.

move up and play 3 tables for the first couple of sessions if you feel like that will help you. don't change your game. Move down if you need to cos bankroll, but you should be fine

Good luck at the new level. As everyone else has said, just keep concentrating on improving and you'll do fine.