Use hook appropriate to bait...that's my rule. I only fished like I was fishing for crappies bigger than 10".
For fathead minnow and number 2 hook...go up or down a size depending on how big the fish you're targeting is.
Other than that...lures with trebles size 10 or larger. I think the size three Salmo Chubby Darter has a size 12 treble hooks.