Any tips in limit, though? It seems the information you can ascertain in limit is much more...ummm...limited.

I find myself getting hammered by two pair more often than I'd like (no straights on the board, no flushes, no board pairing and I have TPTK: bzzzt! The guy who called my pre-flop raise with K4o spiked a 4 on the river for two pair).