Re: JJ. I limp from most positions (raising LP if I feel like it's the play to make). Basically, I treat it exactly like TT, playing for a set or overcards to a fairly low board.

Hand 4: Everyone checked to you. That makes me think it's unlikely anyone has a K. Most people won't slowplay top pair (and those that do deserve a note, so you can punish them for it later). You beat anyone who doesn't have a K, and may get a fold from anyone with a K and a low kicker.

Hand 5: At least you realized your mistake. The thing about calling that $1 is that there's almost no chance he's not making a bigger raise on the turn. You can't draw for 2 outs, so either find out for sure if he has the A (reraise on the flop) or fold and save the money it costs to search for your 2 outs.

Hand 6: I didn't notice the MP caller. Still not sure about the play though. If you put MP on the flush, I like the fold. I put BB on overs with a slight possibility of having a diamond.