I read a lot about the best way to reach your audience. One thing that everyone seems to agree upon is you need to post it with a picture. It is hard to disagree when you compare a post with a picture and without. The next question is usually what kind of picture do you include? I have seen some posts where the picture had no recognizable (by me) correlation with the post. I, on the other hand, believe the picture is important, and should relate to the post as a whole. That way when people see the picture again, they think of you. For example, when someone sees any Google Apps picture, we want them to remember Juxtapose. That way if they are considering moving to Google Apps, they will call us.