Greedo has a good take on it. My 2c:

- Get pokertracker and a heads up display. Gametime+ is free, but not quite as slick as Pokerace HUD.
- Pay attention to your table/seat selection (Fnord made a great sticky on this in Online Poker Rooms). There is no reason to sit in a crap game at these stakes.
- Bankroll management, make sure you have twenty buyins minimum and blah blah blah....
- Don't play low stakes ring without rakeback, or a bonus to clear.

Good luck!