The exception to this is baking supplies, which tend to go on sale around the major "cooking holidays," like Christmas, Thanksgiving, and Easter. Since Easter is upon us, it is time to check your store for specials on flour, powdered sugar, brown sugar, yeast, and spices. Many of these will be displayed on the end caps of the aisles. I tend to buy store brands of most things, but if you prefer brand name spices (which I do for ones I don't grow), there is usually a coupon or two to be had in the weeks leading up to the holidays. Since these baking supplies tend to keep for months or longer, this is a smart time to pick up an extra bag of brown sugar or an extra jar of yeast.
Fast: Obviously, it takes no more time to buy an item on sale than it does to buy one full price. I'll give you that it takes a few extra second to carry that second bag of brown sugar to the cart and then in from the car....
Cheap: Stocking up on basic supplies when they go on predictable sales is an easy and smart money management technique.
Good: Having the right cooking supplies on hand, purchased at a good price, is a great incentive to cook more of your own meals and treats at home.