Black Friday is looming large on the horizon, promising big discounts on TVs, laptops, headphones, speakers, and just about everything else. It's the single best time of the year to shop, with deals on offer from all the leading retailers.

This year, shoppers could score some of the best Black Friday deals by heading to stores like Costco and JCPenney.

DSW: Take 30% off in-store and online through Black Friday. Dyson: Its on-sale items include an air purifier for $800 ($300 off), Hot+Cool Jet Focus fan for $300 ($170 off) and cordless vacuums for $250 ($250 off). Gap: It's offering steep discounts on clothing with 40–60% off popular styles.