Though it rails a bit over-dramatically against the risks & costs of living a too-fast, over-connected lifestyle, the tips and suggested philosophical changes are good.
Chapter 7 offers some particularly good observations on how you are perceived by others and how you can improve the impression you make.
I recommend this one. Many of the points from it have lingered with me and it's a very good balance against some of the other "Go Go Go!!" forces in business writing these days.