Before you do anything, sign up for rakeback. I believe there is a good thread made by spoonitnow in the beginners digest about this in pretty good detail. Rakeback in a nutshell is signing up through a third party that will give you back a portion of your rake. However, you cant do this after you sign up so make sure to do it first!

Also, there are people with great winrates on this site and will be more than willing to help you out, just post a bunch of hands and say what you think and the people here will bitchslap the wrong thinking out of you (assuming there is). I do mean bitchslap too, they will not be gentle

One last thing, while the caliber of player isnt as great at 2/4c (4nl) the books by harrington will help you learn the fundementals and even show you a few things you may not of thought about. His thoughts on tournaments will go along way if you plan on continuing to do sng's or mtts. He also has a book on cash games that is likely to be as beneficial...but ive yet to read it

thats all i got right now...post some hands!