15/30, do you complete damn near anything in the SB?

Haven't played with a 2/3rd blind before. Is there anything you should fold in the SB in an unraised pot? The pot odds are so gigantic it seems everything would be playable.

An in a raised pot, do you treat only somewhat tigher than what you'd play out of the BB? Calling 1.33 small bets gives you better odds than you'd normally get out fo the SB?