Bill Walsh was one of the greatest coaches in NFL history and revolutionized the game by developing the west-coast offense and devising innovative methods in building teams and managing rosters. He was also a mentor to current Seahawks' head coach Pete Carroll, so whenever I get the chance, I watch videos of Walsh's coaching seminars, and from what I've heard, both of his books are absolute must-reads.
The audio on this video is rough, but plug in some headphones, take in that 1990's-vintage audio buzz, and learn a thing or three.