I read this about five years ago, and it organized my brain enough to remember a few things. Firstly, some of the best managers don't multitask as much as they concentrate on doing one thing at a time - and getting it done. More tasks get done, and they can be checked off the paper checklist and the mental worry list. Secondly, they get back to EVERYONE that contacts them, for any reason. They close the mental worry list of the person trying to contact them with a solid "yes", "no" or "I'll work on it", and create good karma wherein more people get back to them. It saves time overall as well because people who don't get contacted back will then worry about what's going on at the other end - and contact that manager again and again looking for an answer. Style-wise, we've talking about an easy to read, interesting, accessible book. More research might have helped flesh out/clarify the themes or added to them, but then again this book comes in an efficient size.