Keep the last word for yourself

Don't end a post with a quote from a famous person -- or any other person, in fact. It is fine to incorporate quotes you like into your post (provided you attribute them), but save the last word for yourself.

Ending a blog post with a quote from someone else is like letting Albert Einstein get up and finish your speech for you. If you do that, even if you are Arnold Schwarzenegger you are bound to be overshadowed by the greatness that has followed you.

You want your readers to leave with your words in their heads and on their tongues, not someone else's.