I usually make a 1/2 sized pot bet the first time. And then about the same on 4th street. If there is a draw out there then I'll bet 3/4 of the pot.

If I get raised and I read trips I get out of the pot. If the pot odds are too tempting then I'll stick around and make a 1/2 size bet on 4th street again. A raise here would really indicated strenth to me and I would fold. You may win the pot here if he was bluffing on the flop.

My best advice would be to generally only play these hands in position. Limping in may cost you little, but it's the betting after the flop that will really cost you. Remember, good poker is putting your opponent in difficult situations, not yourself. You really have to ask yourself what you were expecting out of this hand as well. If you hit your top pair but are still hesitant to play in 1st position, chances are you shouldn't even be in the pot.

There really isn't a substitute for knowing the guy your playing against so every situation is different, but that is how I generally play this situation.