I remember something Harrington said in his book. Paraphrasing..

When someone tells me that he laid down a set against his opponent who he figured had a higher set through some complicated and confused logic, I say "Idiot."

You cant lay down sets because you think someone has a higher set. In fact its almost impossible to ever lay down a set, as it has something like a 25% chance by the river to pair the board and beat even a flush or a straight. I lose all my chips in this situation, and Im happy I do. No other way to play it.

I feel yer pain, I had AK in a ring game yesterday..Flop is 5AK..I bet flop, bet the turn..we check the river and he shows me 2 kings. Yuck. It happens, need to be able to bounce back.