Large white crappie jigs on a line heavy enough to straighten the wire hook out for when you get hung up.
If you are using the common slab jig combo, this is great advice. You can also replace the treble hook on the slab with around a #1 or 2 sized single hook, a light wire hook will also straighten out sometimes. This will significantly reduce your hang ups, though not eliminate them completely, and will also not reduce your hookup ratio. Another added benefit is that its easier to unhook without danger to self, the kids, or the fish if you are releasing them.
Using bait will also reduce the hang ups too.