Stocking up, extremely frugal style

When you come across a great sale (they don't happen often, but when you find them, you'll know), ask yourself three things.

1. How much can I afford?

2. How much do I have room to store?

3. How much can I eat/use before the expiration date?

The answers to these questions can determine how much to buy. Don't overdo it, but don't underdo it, either. A penny saved is truly a penny earned.