Peter Bregman, author of the book, 18 Minutes: Find Your Focus, Master Distraction, and Get The Right Things Done, has a useful website, http://www.peterbregman.com.
Peter also hosts a regular podcast where he discusses different leadership / productivity subjects with guests such as Amy Cuddy, Charles Duhigg, and Carol Dweck.
http://peterbregman.com/category/podcast/