Date: 6/30/2012
Why: Quality of life 

One of Marissa Mayer's first orders of business when taking over at Yahoo! was to bring a little bit of the flavor that made her former place of business, Google, such a great place to work: free food.  During her second week as CEO, Mayer made all the food at Yahoo!'s URL Cafe completely complimentary. In addition to that, Mayer also said she plans to make the Sunnyvale, Calif. headquarters much more "collabrative and cool."