Just a couple of quick suggestions (others can correct my mistakes):

- As mentioned above, increase your range for opening a pot in CO/Btn. Just to be clear.. if there are no limpers... feel free to raise on the button, one in front of the button (or even two in front of the button). People have different ranges for these positions, and it should probably depend somewhat on who is on your left. An ideal situation, is to have 2-3 9/6 VP$P/PFR guys immediately on your left (with various donks/ATMs in the other seats). In this situation you can open raise with ANY TWO on the button.. and maybe be slightly more judicious in the CO.

- Also many people on this site recommend raising all pkt pairs regardless of position others play 22-44 different in EP.. but it's something to consider.

- People often decrease the range of hands they will raise if there are limpers in the pot, but if there are a few REALLY high VP$P guys (sometimes find 50%+) and they are limping in front of you, you can raise more hands than you might normally raise.

GL