Doctor Shares Top Habits To Live Longer

While medical advances that seem like science fiction are helping people live longer lives, don't forget about the little things that you can do on daily basis to increase your odds, said Dr. David Agus, a leading cancer specialist to the stars whose patients included the late Steve Jobs and Lance Armstrong.

"We have to focus on prevention because we weren't designed to go into our ninth or 10th decade," Agus told CNBC's "Squawk Box" on Wednesday, promoting his latest book "The Lucky Years: How to Thrive in the Brave New World of Health."

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