Shops in Berlin open and close at a frenzied pace, particularly in up-and-coming hotspots like Friedrichshain, so the best way to stay in touch with what's happening where is through local guides, such as Tip, Zitty and Prinz. It also pays to make the most of the shopping grapevine in Berlin: word of mouth will reveal the coolest new openings. Just get there before the crowds cotton on.