If you're wanting to go back to basics, take a white or smoke colored grub, rig it on a 1/8oz darter or ballhead jig with the hook exposed, cast and reel. If they are a bit deeper, count it down to the proper depth, then retrieve. If the fish are in shallow cover, rig that thing weightless and reel it in just fast enough to where it is making a small ripple on the surface.
No one throws grubs anymore and it's just about the best shad imitator there is.
For hardbaits, there is no better shad imitation than a jerkbait. I like different ones for different seasons, but for this time of year, you cannot go wrong with the Rapala Original Minnow. I like gold or silver, both with black backs. Throw it to any shady pockets, especially if there is cover in the shade, and let all the ripples settle after it has hit the water. After about 30 seconds, give it one twitch, then wait another 30 seconds. Twitch it twice. Let it sit another 30, then one more twitch and a few second pause. If no one hits it, move on and find another piece of shallow, shady cover.
Good luck!