The Four-Hour Workweek by Tim Ferriss

Don't let the title fool you. This book is not just for extreme financial freedom aficionados, this little gem is useful whether you're an 8-5 corporate type, an intrapreneur, or an entrepreneur. The lessons about how to leverage resources, delegate, and grow multiple revenue streams are applicable to all.

I credit this book more than any other in shifting my mindset and accelerating my career. And, it's a fun read. What's not to like?

From Amazon:
Forget the old concept of retirement and the rest of the deferred-life plan–there is no need to wait and every reason not to, especially in unpredictable economic times. Whether your dream is escaping the rat race, experiencing high-end world travel, or earning a monthly five-figure income with zero management, The 4-Hour Workweek is the blueprint. 

This step-by-step guide to luxury lifestyle design teaches: 
• How Tim went from $40,000 per year and 80 hours per week to $40,000 per month and 4 hours per week
• How to outsource your life to overseas virtual assistants for $5 per hour and do whatever you want
• How blue-chip escape artists travel the world without quitting their jobs
• How to eliminate 50% of your work in 48 hours using the principles of a forgotten Italian economist
• How to trade a long-haul career for short work bursts and frequent “mini-retirements”

The new expanded edition of Tim Ferriss’ The 4-Hour Workweek includes:
• More than 50 practical tips and case studies from readers (including families) who have doubled income, overcome common sticking points, and reinvented themselves using the original book as a starting point
• Real-world templates you can copy for eliminating e-mail, negotiating with bosses and clients, or getting a private chef for less than $8 a meal
• How Lifestyle Design principles can be suited to unpredictable economic times
• The latest tools and tricks, as well as high-tech shortcuts, for living like a diplomat or millionaire without being either