Hand 1 - Bet about 500-600. There are plenty of fish out there willing to call down with bottom pair because you "might be bluffing" and this bet sets you up to put it all in on the next street.

Hand 2 - Push. If the villain is willing to call his chips off with a lesser hand or on a draw make him do it here. A scary river card might make him fold where he'd put it all in on the turn hoping for a miracle card to save him. Fish love to chase after the chips they spew, even with 9 high!