Not familiar with the concept of honor killings? Familiar with them but don’t know much about them or how you of all people might do something about it? Read this post by Azteclady over at Karen Knows Best; read Joss Whedon’s original 2007 post; and then pick up a copy of the book, Nothing But Red to help raise awareness and money for the cause. Heck, buy one for a friend, or a local library.
And please, do read Whedon’s post. I have nothing to add because he already said it all, far better than I could have.