Ultimage George and Jeffrey pretty much covered the pre-flop play for these hands although I would only do the all-in thing in a tourney. These hands become extremely valuable when you flop a set and your opponent flops top pair. You can't pay too much to see the flop because you have only got a 1 in 8 chance of hitting your set. If someone that didn't bet pre-flop is betting into you when there is a 10 or a j on the board you can try to slow play one round or two if the board is not becoming coordinated and take alot of his money. If someone only bet 2x preflop you might call this bet preflop if you are in late position. If a king or queen is on the board and he is betting then you probably have a set to his top pair but beware that he may have an overset. Make sure you bet back hard at him if you are afraid that the next card to fall might give him a strait or a flush. If a lot of people see the flop then you might want to take the pot right there if nobody has bet everybody out yet to avoid somebody out drawing you.