SalesForce.com thinks they have the answer in this image. What do you think?

“Many brands today are posting on Facebook as a means of connecting with their customers and prospects. However, very few have mastered the basics such as the ideal post length, use of imagery, use of color and linking. When used correctly, these small improvements will add up to increased engagement on your posts and extend the viral reach of your messages.

So, what makes a perfect Facebook post? Let this blueprint be your guide.” – Read more on this SalesForce.com Blog Post.