Mine are cliché, but they really did help me in 2010 and hopefully will continue helping me in 2011 and beyond: Rework - Jason Fried and David Hansson Linchpi

Mine are cliché, but they really did help me in 2010 and hopefully will continue helping me in 2011 and beyond: Rework - Jason Fried and David Hansson Linchpin: Are You Indispensable? - Seth Godin