Hand #1) Two pair really isn't a great hand to begin with, so you really shouldn't ever slow play it. Slow playing it on this hand is even worse with this flop because there's a flush draw and a straight draw. I'd bet pot or a little more to take away drawing odds and fold to any aggression.

As played, fold turn. I've no clue what he has, but he sure thinks he's got you beat. As tight as he seems to be playing, I'd guess a set or better.

Hand #2) Preflop looks good. Flop bet seems small, I'd bet at least 2/3 of the pot and maybe PSB to give bad drawing odds. As played, I'd call turn, seems like your pot commited.

Hand #4) I'd probably fold preflop. Typically at this level, a 3-bet means AA or KK. Unless you have a real good read on his three bet range, you're probably behind preflop and you're not getting good enough odds to hope for a set.

Hand #5) Bet pot on the flop to give flush draws and straight draws bad odds. Don't bet the river so big. There's too many crap hands that beat you.