Cast ten feet out. The big ones are deep, and as you get closer, you'll get more small ones. But remember, big gills can exist in shallows and I've been suprised in more than one occasion. Smallies will hit rapalas, jigs, twister tails, etc. Keep the lures to the smaller scale.
Crappies do very, very, very well with a minnow under a bobber.
Also excellent is the classic minnow and jig. You might even pick up a slack-water walleye cruising for a meal. Bullheads are caught with crawler on the bottom. Channel Catfish are small and not plentiful. The bullheads are too many and compete with the channels for food.