Costco, for one single male such as myself, is a dangerous proposition. One very hungry day can end in the delusional notion that 35 units of Mac & Cheese is a good buy. Which it is, economically -- the prices here are very rad per unit! Warehouse stores do that! But man, I'm still trying to eat through them all after two months.
The best thing to do is to have a friend and yourself buy up here and split it into reasonable sizes! This works especially well with their low-cost meats. Divvy up, freeze, you're set for a while. Just be sure to remember how much freezer space you do have or else you're going to block up the entirety of it with ready-made foods (which on the whole are very good even microwaved).
Don't forget the subsidized hot dog for half a buck! Eat it or face being hungry in a place that offers you 150 candy bars...