I take a pretty standard line with pairs here, similar to Dan's. Dump low pocket pairs in early position. Open raise with mid-high pocket pairs as your position gets better. Really the only time I'll limp with a PP is if 1) I know others will limp behind me or 2) others have limped in front of me.

With small pairs in most situations either you hit a set on the flop or you don't. So, if you're losing money with them, you're probably just playing them too often.