Topping our list this year are Wayfair's massive Labor Day event, which features discounts as much as 75% off household decor, Old Navy's discounts across denim, dresses and tops, as well as iRobot's sale on its Roomba devices (which you can score for $150 off).
A lot of sales have already kicked in and are available to shop right now. To make your life easier, we've created this handy cheat sheet.
Amazon: Save big on a variety of tech items, including iPads, 4K TVs and even the Echo Dot.
Nordstrom: Still in need of warm weather clothing (or looking to stock up for next year)? Nordstrom's seasonal garb such as floral dresses, breathable footwear and lightweight tees are a fraction of the original cost.
Target: Discounts on back-to-school essentials, such as backpacks and Chromebooks, outdoor furniture, TVs and more.
Wayfair: Wayfair is hosting a massive clearance sale, featuring up to 75% off products including outdoor furniture, living room seating, bedroom decor and more.
Fashion and beauty
Adidas: Now until Sept. 3, get 30% off sitewide with the code SPORT30.
Alala: Save 50% on select activewear styles, until Sept. 3.
Carbon38: Enjoy 50% off sale styles from brands like Beyond Yoga, Alo Yoga and more, until Sept. 2.
Colourpop: Take 25% off sitewide on Colourpop's fan-favorite makeup and skincare items, through Sept. 3.
eBags: Take 25% off your next set of travel luggage or packing cubes during eBag's sitewide sale, until Sept. 1.
EyeBuyDirect: Get 20% off all frames, plus 30 percent off all lenses with code LABORDAY.
Fossil: Score a hybrid smartwatch for as low as $119, and a full smartwatch, starting at $179.
North Face: Take 25% off select styles and 40% off last season's styles from North Face.
M.Gemi: Take 15-20% off Italian-crafted footwear from M.Gemi (from the "Before They Go" section of the site), until Sept. 2.
Original Penguin: Original Penguin's Labor Day Sale offers an extra 50% off Sale styles with code LABOR50 and free shipping with code OPSHIP.
Old Navy: Ahead of Labor Day, save 30% off all jeans, 40% off all dresses and 50% off all tees.
Perry Ellis: Get top menswear styles for a steal. Save 50% on sale styles, plus get free shipping sitewide.
Skagen: Get a new timepiece for as little as $49.99, no code necessary.
Coby: A variety of Coby products, including wireless headphones and portable speakers, are now on sale via Amazon.
iRobot: Save up to $150 on select floor care Robots, including the popular Roomba.
JackRabbit: Save big on Garmin smartwatches, along with other running and activewear essentials, until Sept. 2.
Lensabl: Save 20% on blue-light blocking lenses, perfect for those who use their laptop or phones daily, with the code BLOCKBLUE.
Mirror: Score free shipping on a Mirror fitness system (a $250 value) with code LABORDAY19.
Rosetta Stone: Ready to learn a new language? Shop Rosetta Stone's software for half its original price.
Allswell: Until Sept. 8, take 15% off mattresses and bedding with the code LD15.
Bear Mattress: 20% off using the code 20LD at checkout, until Sept. 3, plus two free cloud pillows with every purchase
Casper: Take 10% off any mattress order with the promo code LABORDAY, until Aug. 31.
Crane & Canopy: From Aug. 29 until Sept. 2, take 60% off Crane & Canopy's luxury bedding, sheets and home decor.
Cost Plus World Market: Save 30% on regular-priced living, dining, home and office furniture, plus get free shipping on orders over $75 with the code FURNDEAL30.
Hayneedle: A number of outdoor summer essentials, including grills, outdoor dining furniture, porch swings and more, are heavily discounted at Hayneedle.
Joss & Main: Shoppers can enjoy 75 percent off select home products until Sept. 3.
Lulu and Georgia: Save on rugs, lighting and accent pieces until Sept. 23. Shoppers can take 20% off with the code TAKE20
Molekule: With the code LABORDAY19, shoppers can save $100 off a Molekule device.
Nest Bedding: Until Sept. 8, Nest Bedding is offering $200 off select mattresses with the code SUMNITEZZ.
Rove Concepts: Save big on modern furniture during Rove Concepts' Early Labor Day Sale (until Aug. 29), where you can score 15% off sitewide, plus 15% back in vouchers with the code LABOR15.
Sleep Number: Until Sept. 8, Sleep Number's 360 smart beds are up to $600 off, plus you can save 50% on limited edition smart beds.
SodaStream: Score 15% off sitewide with the code LABOR.