And then remember to ask yourself: "What will happen to me if I get this or do this?, and what will happen to me if I don't get this or don't do this?"
Just wanted to add... when you ask this of yourself, also consider the wider circle of people around you, remembering that what you do will bring consequences for others as well, and any harm done to them will evoke some kind of reaction, breakdown of friendship, or retribution. (Ultimately the best way of functioning would be "post-conventional moral reasoning").