Considering the body is 90 percent water, it's no surprise that it's needed for almost every function of the body. One study even found that drinking water in the morning might also help you maintain a healthy weight. Smoking cigarettes greatly increases your chances for lung cancer, hypertension, diabetes and a plethora of other diseases and health conditions.

In 2002, he founded The Jamie Oliver Food Foundation to educate children about food and combat obesity, and last September appeared before the House of Commons to lobby for a tax on sugar in the U.K. His new book, Everyday Super Food , was published in August—and while his business practices have been under scrutiny as of late, we support the message he's trying to spread around the importance of healthy cooking.