I'm with Rusty. If I don't find fish shallow, I'll target first breaks in 4-8'. If the weather turns cold (I mean hard cold) I'll back off to the 8-12' range. Look for places where the fish can move vertically - steep breaks, inclines, ledges. They can do this much easier, and without expending a lot of energy, than moving horizontally (like down a gradually tapered point or flat).