November 27 marks Black Friday, the most anticipated shopping day of the year. With a flood of discounts going on throughout the city and lines of bargain hunters snaking through stores, what you need is a plan of attack. We’ve mapped out more than 50 Thanksgiving-weekend sales, from early-morning bargains (25 percent off at H&M before 10) to freebies and festive perks (hot cider at Billy Reid and Tommy Hilfiger; Champagne at Duo). Plus, scroll down for a preview of which items will be on sale — including cashmere, handbags, boots, books, holiday cards, and more — so you can check off your gift list in advance.