This book is one of my current reads. It claims that performance, health and happiness are grounded in the skilful management of energy.

It gives a link to a free online questionnaire that gives you a snapshot of your overall level of engagement. So if you would like to find out how engaged you are at work and in life, go to:

http://lge.perfprog.com/

The Power of Full Engagement : Managing Energy, Not Time, Is the Key to High Performance and Personal Renewal

Jim Loehr and Tony Schwartz