BRISTOL, UNITED KINGDOM - AUGUST 11: In this photo illustration a woman uses a credit card to buy something online on August 11, 2014 in Bristol, United Kingdom. This week marks the 20th anniversary of the first online sale. Since that sale - a copy of an album by the artist Sting - online retailing has grown to such an extent that it is now claimed that 95 percent of the UK population has shopped online and close to one in four deciding to shop online each week. (Photo Illustration by Matt Cardy/Getty Images)

Black Friday is nearly upon us, and holiday shoppers everywhere are no doubt twitchy with anticipation. But how best to focus one's efforts?

Photo Credit: Getty Images