Flopping overpair when limped with medium pocket pair

I think I make the possibly incorrect mistake of pushing when I should just be potting or overbetting a bit when I do this. Say you hold 88 and the flop is 742 rainbow, you and 2 other people in the pot all have M's of about 20. What do you do if it's checked to you on the button? If you're first to act? Or if you're facing a half-pot bet?

Thanks in advance.

-Chris