[LowDown22]

Here's what I would do (keep in mind I'm relatively new to NL tourneys, so let me know if I'm way off base)

Hand 1:
Tough decision, I'm either all-in or folding, but likely folding(maybe too weak-tight). I think he's probably got an 8 plus an overcard.

Hand 2:
Fold and wait a for a better situation. Too many yet to act for me to push.

Hand 3:
All-in

Hand 4:
I'd raise to 150 or 200.

Hand 5:
Raise, probably about 300.