Proper SB strategy.

[sMethod]

Iv been experimenting adjusting my standards for calling or raising out of the small blind with mixed results playing certain types of hands.
I was wondering what types of hand you refuse to play in the sb when folded to you and when there is 1-4 limpers?
How would you let a loose caller in the on the button affect your calling/raising range. ?
Do you ever raise really light in the SB? If so for what reasons?
What types of hands are at the bottom of your standards for raising in situations where its come to you with no raise?
Have you developed any tactics, strategies, or moves that have had significant increases in the results of your game?