The warming trend before the spawn, late spring, early fall. Lures depend on the body of water and conditions, but slightly smaller versions of the usual suspects. A finesse spinnerbait, smallish square bill, trick worm, 4 1/2" sluggo, curly grub on a round jighead, or something similar is really all you need. Try to find cooperative fish not buried in cover, and you'll be 90% there.