Editor’s note: This is a guest post from one of my favorite bloggers, Gretchen Rubin of The Happiness Project.

I love a good self-diagnosis quiz.
What kind of clutterer are you?
Are you organized?
Are you at risk for dropping out of your exercise program?

Here’s a new quiz that you can take to determine whether you belong in one of two opposite groups: over-buyers and under-buyers.

As members of each category will freely attest, it’s not particularly productive to be in too deep in either camp; both offer certain advantages but also some definite drawbacks.

Does either of these descriptions fit you?

You’re an over-buyer if.

• You buy several summer outfits for your as-yet-unborn baby, then it turns out he outgrows those clothes before the weather warms up.
• You often lay in huge supplies of items like shampoo or cough medicine.
• You often make a purchase, such as a tool or tech gadget, with the thought, “This will probably come in handy.”
• You have a long list of stores to visit before you travel.
• You find yourself throwing things away — milk, medicine, even cans of soup — because they’ve hit their expiration date.
• You buy items with the thought, “This will make a great gift!” without having a recipient in mind.
• You think, “Buying these things shows that I’m responsible, organized, and thoughtful.”

You’re an under-buyer if.

• You buy saline solution, which you use every morning and night, one bottle at a time.
• You often scramble to buy an item like a winter coat or bathing suit after the point at which you need it.
• You’re suspicious of specialized objects and resist buying things
• dedicated very specific uses, like suit bags, special plastic plates and
• cutlery for children, hand cream, or rain boots.
• You often need to come up with a makeshift solution, such using soap because you’ve run out of shaving cream, because you don’t have what you need.
• You often consider buying an item, then decide, “I’ll get this some other time” or “Maybe we don’t really need this.”
• If you must buy something, you buy as little as possible – say, by putting $10 of gas in the car.
• You think, “Not buying these things shows that I’m frugal and not a consumerist sucker.”

Me? I’m an under-buyer.

Under-buyers feel stressed because we don’t have the things we need. We make a lot of late-night runs to the drugstore. We’re surrounded with things that are shabby, don’t really work, or aren’t exactly suitable.

Over-buyers feel stressed because they’re hemmed in by stuff. They often don’t have enough storage space for everything they’ve bought, or they can’t find what they’ve bought. They feel oppressed by the number of errands they feel like they need to do and by the waste often created by their over-buying.

So under-buyers-buy what you need, without procrastination! Don’t wait for the first morning of your ski trip to buy ski gloves! Over-buyers-think it over before you whip out your wallet! You don’t need a ten-year supply of toothpaste!

To read more from Gretchen, check out her blog, The Happiness Project, or subscribe to her feed.