"We don't have government funds to carve out as much data for things like sex addictions, exercise and others, " says John Fitzgerald of the Center for Addiction Management.

FORBES: The Most Expensive Addictions

Katz also likes an exercise called "histories of the future, " originated by Center for Applied Research, a management consulting outfit.

FORBES: Magazine Article

He designed an exercise regimen that made him the Jack Lalane of their Placerville, California, assisted living center.

FORBES: And Now for the Toughest Influence Challenge of All: Changing Myself