In general, if someone is giving me a lot of cutesy resistance (raising me, especially check-raising me, or leading on multiple streets) I slow way down with overpairs. And if the bets get too big I let them go without a second thought. At the lower stakes you can figure that 9 out of 10 opponents, at least, are too dumb and passive to get that silly with hands that you can beat with a single pair. They may bet into you once and may call your raises, but they're not typically check-raising you or three-betting with hands you're ahead of. Remember that and don't pay them off. I wait to have a read (usually at some other sucker's expense) before I will look somebody up in this kind of situation.