These aren’t as much myths as they are platitudes spoken like hard and fast laws.
Myth: You don't leave fish to find fish. Busted: Schooling fish are often all the same size. If all you are catching are "rats," try another location.
Myth: You need big baits to catch big fish. Busted: Elephants eat peanuts; big fish often gorge on small bait, so match the hatch for success.
Myth: Circle hooks never gut-hook a fish. Busted: There are circle hooks and then there are circle hooks. Those that are offset or have the point bent toward the eye, instead of the shank, will gut-hook fish.