Small hooks, small fresh dead shrimp for croakers and whiting
Whiting have small mouths, so it makes sense to use a shrimp-piece that it can take into its mouth all at once. I'm using a #2 circle hook.
The folks around me today that were not being especially succesful were using WAY too big of hooks with WAY too much bait for fish with really small mouths.
Here's what I do: I use a shrimp-piece no longer than one inch. I remove the shell of a fresh-dead shrimp and never fish for whiting/croakers with the tail itself (it just allows the fish to leverage the bait off of your hook). Then, the fish will bite and take in the whole bait. Now here's the difference between using a circle hook and a J-shaped hook - You'll feel a series of taps. If it's a J-shaped hook, set the hook when you detect the bite. If it's a circle hook, just keep the line tight and the fish will hook himself. Start reeling when you see a significant bend in the rod. If you don't catch the fish, stop and let it find the bait again. If there are no more bites, then your bait is probably gone.
Give small hooks and small baits a try with whiting to see if your catch rate improves.