One simple trick that allows you to peel a whole head of garlic in under a minute! -- place entire head of garlic in a bowl, place an identical bowl on top, and shake! The head breaks apart into cloves, and the skins fall right off.
How to keep cut potatoes from browning (so they can be cut ahead of time and kept in the fridge). To keep potatoes from turning brown or becoming mushy when cooked, add some white vinegar Tbsp. per 2 cups water) before submerging the potatoes.