Stacked a guy ... and a brutal bad beat

A set of 8's: http://www.pokerhand.org/?580756. I played pretty aggressively.

Lost to a set on the river. Brutal bad beat. I should have raised the flop and pushed the turn. I figured that with being ahead, I would let him catch up. Bad idea.

http://www.pokerhand.org/?580785

I got some of it back when I flopped the nut straight and pushed it.

http://www.pokerhand.org/?580798

What a bad play with KK! I told myself I would push it unless an Ace came. Two came what what did I do? Pushed my stack none the less. Horrible.

http://www.pokerhand.org/?580821