Anyone having a working relationship with me knows I like the power of the outdoor medium (done well!).  Here are two simple rules to follow for great outdoor executions. One, start with a great visual and make it large enough for people to see and comprehend quickly.  Two, keep the main headline to a short word count (5 or less is optimal). Click on the image to see a flawless execution - I stumbled onto this board on my google reader feeds a couple weeks ago, it is from somewhere back east I believe.