[MattS]

Hand 1) I just call with high only hands. You want to trap low draws on the flop/turn if you have hit a decent high hand. But because you will miss the flop very often it is better to see the flop cheaply.

Hand 2) I will bet this hand on the river and call a potential raise. You want a fold from better low hands and you want value from trip aces or weaker full houses.

Hand 3) Fold this hand preflop. Hands I consider worth playing from the small blind are of the type wwhh and wwwx (w - wheel card, h - high card). As played fold turn and avoid a complicated situation on the river.