Another good tip is getting power items like a small power strip that can convert one plug to 3-4. I have a Belkin one that takes a plug from 1 to 3 plus 2 USB plugs. I made many friends in 2011 and 2012 with that. Another power item for phones and tablets that charge off USB is portable USB rechargers. With the help of @mke077 and @michaelbender, we tested 3 at last TechEd. I will get a post up on our reviews.