Declining foot traffic and slumping profit margins are forcing several brick-and-mortar retailers to shift into survival mode. Consumers are doing more of their shopping online, lured by the convenience and great deals offered by Amazon and other competitors. As a result, the stores are tweaking their strategies, hoping to rake in big sales in the process. For one, Wal-Mart has been forking over cash to increase sales online, buying discounter Jet.com and building out its distribution system. It's also invested in remodeling hundreds of stores, reducing inventories, and pushing down prices. Target will forego $1 billion in profits by lowering prices and pushing digital sales with lower margins. It will also spend billions to renovate roughly 600 stores and open 100 smaller ones over the next few years. As part of its ongoing effort to get smaller to combat losses, Sears will be closing another 100 Sears and Kmart stores in 2017. Having already sold off its Craftsman tools b...