Memorial Day is coming up, and it’s a great time to find a deal. But how do you know what’s actually worth spending your money on? We asked Jessica Teich, the director of editorial commerce and product reviews for Good Housekeeping. She and her team of experts sift through hundreds of thousands of deals each year to figure out which ones are worth buying, and when, so you can save the most money.The best deals"Memorial Day tends to be the time of year where mattresses are at their cheapest that you will find them all year long," says Teich. "Right now is the best time to find a really great deal on a top-tested mattress like Saatva, Casper and more." Teich says you can also expect to find deals on summer essentials and outdoor gear, like grills, patio furniture, and outdoor paint. What else to considerTeich says deals on tech tend to be better around Black Friday, and fitness gear is usually at its cheapest at the beginning of the year. However, this year's Memorial Day savings events come with a big caveat — the fear that tariffs could drive up consumer prices."We really can expect price increases across the board, so baby gear, clothing, tech, appliances, all will likely be seeing price increases in the near future if not already," says Teich. "So right now, if you are seeing a great discount on something that you've been wanting, it's probably a safe time to buy."Teich recommends planning purchases carefully and avoiding panic buying, even with potential price increases on the horizon."If you have something that you really do need to replace, then right now is a good time to look," says Teich. "But we really don't want to see people running out and stockpiling, or panic buying, or responding to the frenzy."Where to shopThe National Consumer Unit reached out to several retailers about their upcoming Memorial Day sales events. Here's what they told us: Mattress Firm Mattress Firm's Memorial Day Sale has already begun and runs through June 10, with deals including:Up to $700 off select mattresses.Free adjustable base (up to $499 value) with qualifying mattress purchases.Bundle and save up to $150 when you grab two pillows, a mattress protector, and a sheet set.You can search through more of their deals here. Home DepotHome Depot's Memorial Day Savings event begins May 15 and includes deals like up to 35% off select appliances. You can search through their sales by department here. NordstromNeed to stock up on summer clothing? Nordstrom's Half Yearly Sale runs from May 21 to June 1 and includes deals up to 60% off. You can find their sale items here.