Marissa Mayer’s 9 Principles of Innovation Marissa Mayer’s 9 Principles of Innovation. I like this list. We already do some of this; I’d like to do more. Good luck to Marissa as she joins Yahoo! Hat tip: Sherilee. By Brent Logan Engineer. Lawyer. WordPress geek. Longboarder. Blood donor. Photographer. More about Brent. View all of Brent Logan's posts.