P.S. On Willpower

The other interesting fact I left out yesterday was this:

You can "build your willpower muscle" with any number of things. And then use your new willpower power on something bigger or harder.

So, for instance, you could choose to build your willpower muscle by stopping swearing first. Stopping swearing is "easier" than, say, running 5 miles a day. But the strength you build by not swearing will help you in the workout area later.

Stop swearing. Then stop road raging. Then stop eating after 8 p.m. You get the idea.