I just found a typical hand example from yesterday that covers what Thxlbx says about raising limpers from the Blinds and what ED says about min-raises which hasn't really been my experience:
I'm SB
[Kh] with $48 (almost 200BB)
CO fairly new, but seems a little too loose with $38 (150BB about)
CO open-limps, I raise to $1.25, BB folds, CO calls
[3c][Kd] Pot $2.75
I bet $2, CO min-raises to $4, I re-raise to $10.50, CO calls
Pot $23.75
I check, he pushes for $26.85, I call
He has
[9s]