We all know that having fun enriches our lives and lifts our spirits, but so often life gets in the way. Fun seems like something we did when we were kids, and we just don't have time for it now. I mean, we barely have time for all the stuff we have to do, let alone the stuff we want to do. We can go days without actually having any fun at all. If you ask New York Times bestselling author Annie F. Downs, she'll tell you that's...