Even though holiday gift-giving is behind us, you can still act to make sure you got the best deal possible on some of your purchases. Here are six steps you can take:

Check for sales on gifts you already purchased. If you bought any big-ticket items as gifts, see whether they’ve gone on sale after the holidays, advises Edgar Dworsky, founder of Consumer World, a consumer resources website.

If you find that an item you bought has dropped in price, many merchants will agree to credit you for the difference. Kohl’s, Old Navy, Target, and others have 14-day policies, but others allow more time. Sears and Ugg, for instance, adjust the price you paid within 30 days of purchase. Walmart gives you 90 days. Target, and some others, will adjust the price if you find the item you bought for less at a local competitor.

You should also check the terms of the credit card you used. Some Chase cards, including the United MileagePlus Explorer Card, and all Discover cards will credit you up to $500 if you used the card to buy a product that goes on sale within 90 days of your purchase. 

Send in any rebate forms. You can lower your expenses by submitting any rebate forms that might have come with items you purchased. Keep in mind that there’s typically a deadline. A $10 rebate on a two-piece luggage set from American Tourister Compass purchased from Kohl’s, for instance, must be postmarked by Jan. 15. A $20 rebate on a Braun Series Five men’s shaver from Macy’s has to be requested within 30 days of purchase.

Ask for the receipt. It may seem like bad manners, but if you were given a gift, you may need the receipt to make a warranty claim to prove when it was purchased, according to the Federal Trade Commission. Some manufacturers will accept a gift receipt, but others will want a receipt that includes the price paid.

A receipt can also be useful if you want to return or exchange a gift. Some stores, such as B&H Photo Video and Sears, limit returns for most items to 30 days. But they’ll give you more time for holiday purchases. Items purchased from B&H from Nov. 1, 2017, to Jan. 1, 2018, may be returned or exchanged by Feb. 1. Sears gives customers until Jan. 31 to return items they purchased from Nov. 1 to Dec. 24.

Without a receipt, a store may only offer you store credit equal to the lowest recent selling price of the item. 

Fill out the product registration form. If you can’t get the receipt, register the product you received. That may also help you qualify for a limited warranty, according to the Federal Trade Commission. Computer maker Lenovo and Wahl Home Products, for example, will use the registration date to determine that a warranty is in effect. You typically complete and return the warranty registration card that comes with the product, though some manufacturers let you register online.

Register gift cards. If you lost a gift card—say, a prepaid card from TDBank or a gift card from Starbucks—you could be out of luck. However, if you registered it, the card issuer may replace it, says Christina Tetreault, senior staff attorney for Consumers Union, the policy and mobilization division of Consumer Reports.

Update your homeowners insurance. “If you got something pretty substantial—electronics, computer, or some other big-ticket items—include it in your insurance inventory,” says Michael Barry, spokesman for the Insurance Information Institute. That way if it’s stolen, your homeowners insurance may cover the loss.