[shoxbb6]

1st Hand: 3-bet the turn and call an all-in. I'd rather 3-bet here than call because you're oop and villian might not pay off on a [img]/images/graemlins/heart.gif[/img] river.

2nd Hand: I'd probably fold preflop, but I don't like the double check-raise. On the flop, definitely don't check-raise with tpnk. If villian has been playing aggresively and raising/c-betting alot, I might call the flop. But I'm more inclined to check/fold it because your hand has big reversed implied odds with the drawy nature of the flop.
After the flop checkraise, just lead out for 3/4 pot, you most likely have the best hand and you need to protect it. Going for the checkraise here is bad after the flop checkraise. More often than not villian will simply check behind the majority of his holdings.