Kara Swisher got hold of an Aug. '11 Yahoo (YHOO) document outlining a 3-year product strategy. The kicker: many of the ideas discussed, such as increasing personalization and developing content with non-PC devices in mind, bear a strong resemblance to the ones Marissa Mayer brought up during Tuesday's all-hands meeting. When asked about this similarity by a Yahoo employee, Mayer suggested better execution will make a difference.