Help me to maximize profits on big hands (Better way to play these)

Hand 1 is fairly standard w/o a read. Most hands that will call a re-raise will beat you, although given the stack sizes, it looks debatable.

Hand 2 just calling the flop is OK - especially if you know that you will get an overcall, but betting the turn would be nice.

Hand 3 you gotta bet too. It's easier to get more money in the pot by betting rather than being sneaky.