This year may be the biggest Black Friday yet for online shopping, says web analytics firm inMobi. With retailers eager to get a jump on the busiest shopping day of the year, it's hard to know where to concentrate your efforts. For many looking for household wares, retailers such as Target, Best Buy, Macy's Kohl's, Walmart, and Toys R US will all be opening the evening of the day before, on Thanksgiving itself.

For those in the market for gadgets, Best Buy will be offering bundles leading up to Thanksgiving this weekend, both in brick-and-mortar stores and online, and will be running a sale on Friday and Saturday. According to Hayley Tsukayama of the Washington Post, the electronics retailer is offering such deals as $300 off on an LG 47-inch LED HDTV at $700 and the 70-inch LED Smart HDTV from Sharp for $2,000.

The estimated total of approximately 152 million holiday shoppers anticipated for this year's Black Friday weekend includes two groups: the approximately 74 million shoppers are expected to flood retail locations initially, as well as the additional 77 million who will gauge the value of the bargains before diving in, said a report released by the National Retail Federation on Thursday.