i find that at those low limits, there's an amazing number of players who call on the flop with anything then routinely fold on the turn to any bet, even if the bet is about the same amount as the flop bet or just a little bigger.

Normally if I have absolutely nothing, I give up on the turn, but if I do have something (as little as bottom pair or a gutshot) I'll bet again, but not a real big bet. This play won't work against everyone though, only the weak-passive types (and there's lots of those at low limits)