Slowing Down with over pair

When do you guys slow down betting with an over pair?

Example. You are dealt TT, JJ, QQ and you raise pre flop and get 1 caller.

Flop comes all low cards. You bet the pot and get called. Turn is another low card. Do you you make another pot bet or slow it down? Same for river?

Been getting killed with over aggressive play with over pairs. Been getting called all the way to showdown only to find the villan have a set or a higher pair like KK or AA.

Like most poker questions, the answer to this one is "depends." If there is a flush draw and/or likely straight draw out I would be more inclined to make a sizeable bet to cut off odds (2/3-full size of pot). If it's a rainbow board with no likely straight draw, I might bet only about 1/2 the pot so as to get action from weaker hands, control the size of the pot in case you're beat, and not put yourself in a situation where only a better hand calls. A lot also depends on what you know about your opponent. Is he a fish/calling station who plays weak hands and gets attached to little pairs, always thinking the other guy is bluffing overcards? If so, fire in a big bet and make him put more money in drawing at 5 outs. Is he a good, solid player who rarely slowplays or traps with big hands? If so then you have to evaluate the hand and determine what he has. If you have QQ, raised preflop and just got called from him, and the flop and turn are all rags, then he likely has a smaller overpair or strong draw so you should make a nice sized value bet (2/3-3/4 of the pot sounds about right to me). If you have TT or 99, he could very well have a better overpair than you, so you should consider checking or betting small to see where you're at. If he is a good player who is tricky and likes to slowplay and trap with big hands, then you should think about just checking or making a small bet to control the size of the pot in case he's trying to trap you. In addition, checking has the added advantage of making it look like you were bluffing the flop, which could either lead to him paying you off with a weak holding or inducing a bluff on the river that you can snap off.