In his 72 years, Pat Williams has been a minor league baseball player, the general manager of four NBA teams, the author of nearly 80 books, a motivational speaker, a marathoner who has completed nearly 60 races and the parent of 19 children, including 14 adopted from around the world.

And for the past year, Pat has been battling cancer of the bone marrow.

Even on his sickest days, one thing has never changed — his eternal optimism about the future.

He shares what his extreme dream is now and offers his healthy living tips for helping anyone not only live a long life but for preparing their bodies for the possibility of some day battling a disease.

If you think the best years are behind you, Pat explains why he thinks the best 20 years of your life should be between the ages of 70 and 90.