oh my god..i am one of those people
i can not leave anything incomplete..
sometimes when i think i wont be able to finish something..i dont start it at all..
because i know if i start it..i am gonna have to finish it..no matter what
delegating is a privilege which one earns with experience and higher title. to set a good example, one must genuinely indicate self reliance in completing one's projects.
I don't think you can make someone complete their work... they have to learn it for themselves and that can be accomplished through creating an atmosphere (and not by relying on micromanagement). As you mentioned, setting an example is the way to go.