Most of what I read in this space is productivity stuff. I like a lot of Cal Newport's stuff, and Gretchen Rubin's as well.

Two sort of under-the-radar books I found incredibly useful were Two Awesome Hours: Science-Based Strategies to Harness Your Best Time and Get Your Most Important Work Done by Josh Davis, and Work Clean: The life-changing power of mise-en-place to organize your life, work, and mind by Dan Charnas.