This article is reprinted by permission from NextAvenue.org. When I was in my early, anything-is-possible 30s, I left my safe, stable job as a mental health counselor to start, of all things, an ...

Half-life is the date on which half of the total principal of a mortgage, bond, or other debt has been paid off or comes due. The term half-life refers to the point at which half of the total ...