Hand 1:

I agree with limping in and betting the OESD. I think if you are going to bet that much on the turn, however, you might as well go all in there. Your're pretty much pot committed. Calling the re-raise was to be expected.

Hand 2:

I'd probably bet pot sized or at least 2/3 pot sized bets on the flop and the turn to chase away flush draws. I'd have folded the re-raise on the river.

Hand 3:

Bet either pre flop or post flop. I don't like going into the turn blind.

Hand 4:

Got nothing.

Just my $0.02