Here's what you should buy on Amazon Prime Day 2019 based on the best deals we've seen in past years

Whether you want to blast your music loud and clear or keep the listening experience to yourself, you'll be able to save this Prime Day. Deals we've seen in the past were no small change: think $300 off KEF Bookshelf Loudspeakers and $50 to $60 off portable Bluetooth speakers from brands like Ultimate Ears. Unlike other categories, which may be dominated by just a few brands, there will be a large variety of speaker and headphone brands fighting to offer the best Prime Day 2019 deals.

There was an almost overwhelming number of smart security camera and smart lighting deals on Prime Day 2018. Amazon-owned Ring usually discounts a number of its cameras, with the Doorbell Pro being the most popular, but the Doorbell 2 and Spotlight Cam are quality alternatives. While Ring devices are doorbell-camera systems, Blink makes dedicated security camera systems if you prefer those.

Inside the home, Philips Hue smart light bulbs are a cool and convenient home upgrade that won't take much set-up or maintenance. Last year, the deals from Sengled and Leviton also caught our eyes.

If you haven't joined the cult of Instant Pot yet, Prime Day is your chance because it goes on sale every single year. Other small kitchen appliances you might want to buy are blenders, coffee makers, sous vide cookers, and air fryers. Classic brands like Crock-Pot, Vitamix, Cuisinart, Keurig, and KitchenAid all saw significant deals during past Prime Day events.

We look through deals all day long come Prime Day, but the deals we end up buying ourselves are also often the most overlooked: bulk home supplies like toilet paper and paper towels. Amazon's Presto! brand is highly rated and already affordable, and you'll be able to save even more on Prime Day. After the sales event, you can bet you won't be running out of toilet paper any time soon.

Top-performing vacuums from brands such as Eufy, Dyson, and iRobot are normally quite the investment. On Prime Day, however, you can usually take $100 off these popular robot vacuum cleaners and cordless vacuum cleaners. There will also be plenty of regular vacuum cleaners on sale, but if you want an especially high-tech and powerful model, we would place our bets on deals from the brands above.

Prime Day is prime time to get ahead of the back-to-school shopping rush. Although you or your student may not be going back to school until August or September, it's smart to take advantage of current deals. Last year, we saw deals for supplies (Crayola, Sharpie, Post-It), backpacks (Herschel, Under Armour), laptops (Acer, ASUS, Google), and dorm room essentials (RoomMates, AmazonBasics).

When the best of the best are on sale, it's a no-brainer to go for the purchase. We organize our deal roundups by category (e.g. tech, home and kitchen, baby) and budget (e.g. under $50, under $25), but we also highlight when the products we recommend in our buying guides are enjoying deals on Prime Day. In 2018, we showed you 100 of the best products, from laptops to sports accessories, that were on sale. Check back here this year for a similar guide.