An awesome post by John Moore about what he has been learning during his Improv lessons. Brand Autopsy on Improv
Harry Beckwith: Selling the Invisible : A Field Guide to Modern Marketing
If you are in the service business this is a MUST. Unbelievable ideas you can apply right now. Buy anything Beckwith!
Izzy Gesell: Playing Along: 37 Group Learning Activities Borrowed from Improvisational Theater
IzzyG's explains the best Improv techniques.
John McWade: Before & After
Always on my desk - Before & After has beautiful collateral design ideas that will make you look beautiful.
Seth Godin: Purple Cow: Transform Your Business by Being Remarkable
An evolving look at marketing that changed the way I do things. If you ever have the chance have some sushi with Seth it will change your future.
Bruce Bendinger: The Copy Workshop Workbook 2002
Is that blank page freaking you out? This book will jar writers block for copywriters, 1000's of great examples.