A floating minnow lure, like this Rapala Scatter Rap Minnow, is one of the deadliest and most versatile plugs you can cast. Here are some tips for fishing them.
Cast and let the lure sit until the ripples have dissipated. Then twitch and jerk the lure to imitate a wounded baitfish. Reel in only enough line to take up the slack.
Cast up-current of overhanging branches or banks and allow the lure to drift down before beginning the retrieve in order to fish spots unreachable by casting directly.
When fishing in current, retrieve across the flow for the best action. Retrieving with the current negates lure action, and since baitfish rarely swim up-current, that retrieve is ineffective (though anything can happen).
To make release or removal easier, crimp the barbs and/or swap out the tail treble hook for a single hook two sizes larger — which will help retain the lure's action — when fishing for toothy species.