set mining....
you have a small pocket pair 22-66, you know you are behind or you know other players in the hand have 2 over cards, pre flop 3 people are in the hand and you flat call with pot odds.
You hit you are huge and will take down a big pot, you miss and there are 3 overs on the board to your pocket. fold and fight another day.
Dont fear set over set, but if you hit, bet around 60-75% of the pot and find out who thinks they can beat you when there are 4 or 5 people in pre flop.
A good player can always fold a big hand, because there will always be bigger hands out there that can beat you.
Steve