John Maxwell has a great post up on Leading a Life of Intentional Influence. Excerpt:
In the classic Christmas film, It's a Wonderful Life, George Bailey is given a tremendous gift: the opportunity to see what life would be like without him. As he wanders through a world that has no memory of his existence, George is dismayed by the plight of his friends and family. Devoid of his influence, their lives lack the warmth and richness he is accustomed to seeing. As George struggles to come to terms with his bleak surroundings, Clarence, his guardian angel, sums up the lesson that he hopes George will absorb from the experience.
"Strange, isn't it? Each man's life touches so many other lives. When he isn't around he leaves an awful hole, doesn't he?"
Read more here.