Care to post some histories to get specific tips?

Letting go of QQ when it's not the winner is key to making it pay off, but it sounds like you're taking that into account (as far as overs on the table). The flopped quads thing sucks. On a paired board, I'll be a bit more cautious unless I have a read on the player, but this same thing can happen with a flopped set. It's how a lot of players make their money with pocket pairs - busting big hands. I'm working on learning to spot things like this myself. The only tips I can offer there is that if it seems like someone would have to be an idiot to call your bet with a hand that would hit the given flop (and the player doesn't strike you as an idiot) slow down and feel him out.

Your bets sound reasonable in size.