A. J. Jacobs

I pledged to become the world's greatest expert in a field I knew nothing about.

It's sort of my job to feel good.

I tried the paleo diet, which is the caveman diet - lots of meat. And I tried the calorie restriction diet: The idea is that if you eat very, very little - if you're on the verge of starvation, you will live a very long time, whether or not you want to, of course.

There's a very passionate pro-chewing movement on the Internet called Chewdiasm. They say that we should be chewing 50 to 100 times per mouthful, which is insane. I tried that. It takes like a day and a half to eat a sandwich. But their basic idea is right. If you chew, you'll eat slower and you will get more nutrients.

I was very good at sitting. But I just read so much research about how horrible sitting is for you. It's like, it's really bad. It's like Paula-Deen-glazed-bacon-doughnut bad. So I now move around as much as possible.

The best we can do, to paraphrase Pollan, is to eat whole foods, mostly plants, and not too much.

My goal? To test out every diet and exercise regimen on planet earth and figure out which work best. I sweated, I cooked, I learned to pole dance. In the end, I lost weight, lowered my cholesterol and doubled my energy level. I feel better than I ever have.

I was what they call 'skinny fat' - a body that resembled a python after swallowing a goat.

I have little shame, no dignity - all in the name of a better cause.

The key to making healthy decisions is to respect your future self. Honor him or her. Treat him or her like you would treat a friend or a loved one. A Stanford study showed that those who saw a photo of their future self made smarter financial decisions.