The holiday season is officially here, which means it's time to start thinking about gifts. But it's also the time when most things are actually on sale, so those purchases might not end up being too painful.

When it comes to Black Friday, Amazon is taking center stage. The retail giant just announced its official Black Friday sale will begin on November 21 and run through December 2. From Dyson and Levi's to Hot Wheels and Ninja, you can expect tons of massive markdowns on your favorite name brands.