Managing OneselfWe live in an age of unprecedented opportunity: with ambition, drive, and talent, you can rise to the top of your chosen profession regardless of where you started out. But with opportunity comes responsibility. It's up to you to carve out your place in the world and know when to change course. It's also up to you to keep yourself engaged and productive during a career that may span some 50 years. In Managing Oneself, Peter Drucker explains how to do