As stated above, I usually use one of 2 things: Smallest jigs i have, cast and retrieve VERY slow, occasionally giving slight twitches.
First choice:
6lb test main line. Drop shot with 3/8" weight tied to end. about 12" up the line I tie a small loop, and then attach a 4" leader of 6lb test tied to a size 12 plain dry fly hook. (low profile hook for tying your own flies). I then put a small piece of live worm on the hook, or use powerbait artificial worm. Cast out and retrieve very slowly. This usually works great for me. I took my boat out to a local lake about a week ago and tried this method with 3 rods between me and my kids. We caught 4 perch in 2 hours. Past trips with this method have landed 30+ fish in an hour with a single rod.