Tony Dungy on being a Mentor Leader and the mindset that "Your only job is to help your team be better."
Douglas Stone, Bruce Patton, and Sheila Heen weigh in on different ways to tackle hard issues.
Project Management Institute's guide to the Project Management Body of Knowledge. The holy grail of traditional project management documentation and learning.
Mickey Mantle and Ron Lichty discuss the rules, tools, and insights for managing software teams and their individuals. If you want to meet Ron, join the BeyondAgile meetup group (see the M logo above).