Thrift shopping is great for the environment — as well as your wallet.

After working at a thrift store for over a year, I did a lot of shopping. I got some great pieces and some that had broken zippers and stains. I got some things I never used, and others that I use time and time again.

It is important to remember that there’s always a reason something was donated — whether someone changed their mind or the item really is damaged. Here are some tips and tricks for determining if your latest find is a must-buy or a big bust.

1. The smell test

It sounds weird, but some smells just don’t wash out. Clothes that smell like smoke will likely always smell like that.

2. Check for holes

Put your hands in the pockets, the crotch, and armpit to look for holes and tears.

3. Check the zippers

Make sure these work!

4. Check the buttons

See any missing buttons?

5. Plug in electrical items

Find an outlet in the store to check lamps to make sure these turn on and work correctly.

6. Check near the end of the rack for sale items

The newer items are put near the front of the rack and storefront. The oldest product will go on sale before it’s taken off the racks.

Stores sometimes strip sales tags before sale day hits — but if you know where to look, you can find more sale items.

7. Donate your old items for coupons

This will help to make room for new stuff while also saving you some extra bucks. At some stores, the more you donate, the more you save.

8. Shop early in the week

Most people drop off donations on the weekend. That means that the production team will start sorting through and pricing products on Monday and send them out to the sales floor throughout the week.

To have the best selection, avoid weekends when everyone shops!

9. Senior, military, and student discounts

Different stores have special days for discounts while others offer daily discounts. Check with your local stores to find out their schedule.

Take your grandparents shopping and take your student I.D. card!

10. Shop off-season

Most people don’t think to look at sweaters during summer — so with less shopper competition, you can find some great pieces.

11. Remember that you can’t return items

Most stores give you seven days to exchange your purchase for something else, but don’t expect to get cash back.