During stocked rainbow fishing in the winter and early spring, I always set out a rod with corn on it while I fish with spinners or flies for rainbows. I always set my kids up with corn on these trips. Never caught much else on it. I'vfe been fishing with corn for stocked trout for nearly 30 years, and it was a game warden who told me to use canned corn.
I always keep a tiny can opener in my tackle box for corn.
I've never fished with bread either, as one of the other threads talks about. But when I was a kid, fishing often in several of the ponds and lakes on a local golf course, we used to use bacon, and caught bass and catfish on it.