Principles of software development from an alumnus of the WPF team

I got an email the other day from Ivo Manolov who worked for several years as the test lead for WPF and then for a bit as the PM lead. He's recently moved to a new group, but he summarized what he's learned from his experience leading the WPF team into two blog posts. One on driving projects (Principles 1: The Essence of Driving – A Crash Course in Project Management) and one on testing (Principles 2: Principles of Software Testing).