If you have a collection of related works most of this will not be new to you but if you don't this is a pretty thorough course teaching things that you need to focus on to achieve.
It is presented well and is well organized.
Listening helps you to see a number of things you can do or change to make your work easier, more streamlined and tips and tricks to help you reduce the hours you have to work.
It does have some ideas that I don't think are practical for allot of people.
I did find it worth getting and do recommend it.