Scott Galloway, a business leader and NYU professor, shares that we're now spending over 4 hours a day on our mobile phones--up from just 20 minutes in 2010. (…I wrote part of this post on my iPhone.) What does this mean? Lots of opportunities for Amazon--as well as Facebook, Instagram, and other tech titans--to sell to us. Our cell phones are, in essence, 1,000 'buy buttons' in our pockets (or on our nightstands) that encourage us to buy stuff online, any time of the day.