I am sucking at SnG's

I have only placed 3rd once out of the last about 10 Sit 'n Go's, but have been able to make most all of my money back playing 6 handed .10/.25 NLHE. At first I was losing my SnG's because of some really poor play, but the last hand that did it to me was my KK all-in preflop to JJ. Flop was rags, turn was a J and just to rub it in more, river was another J.

But even after all those bad beats I was able to play a decent game and make my money back. I just need to play tight and good poker because I still believe I can beat the SnG's on a normal basis if I just get back to my regular game. I bet it was all my dumb playing in the play money games that has thrown me off. I'll try some more SnG's tomorrow.