Rewards can deliver a short-term boost—just as a jolt of caffeine can keep you cranking for a few more hours. But the effect wears off—and, worse, can reduce a person’s longer-term motivation to continue the project.

We have this myth that extroverts are better salespeople. As a result, extroverts are more likely to enter sales; extroverts are more likely to get promoted in sales jobs. But if you look at the correlation between extroversion and actual sales performance - that is, how many times the cash register actually rings - the correlation's almost zero.

The problem with making an extrinsic reward the only destination that matters is that some people will choose the quickest route there, even if it means taking the low road. Indeed, most of the scandals and misbehavior that have seemed endemic to modern life involve shortcuts.

While complying can be an effective strategy for physical survival, it's a lousy one for personal fulfillment. Living a satisfying life requires more than simply meeting the demands of those in control. Yet in our offices and our classrooms we have way too much compliance and way too little engagement. The former might get you through the day, but only the latter will get you through the night.

I think people get satisfaction from living for a cause that's greater than themselves. They want to leave an imprint. By writing books, I'm trying to do that in a modest way.

Studying design has made me a much, much more astute observer of this aspect of business. And I'm working mightily to improve my empathic skills. I've dramatically improved my ability to read facial expressions - and I'm trying to be a better, more attentive listener.

I happen to be extremely left-brained; my instinct is to draw a chart rather than a picture. I'm trying to get my right-brain muscles into shape. I actually think this shift toward right-brain abilities has the potential to make us both better off and better in a deeper sense.