I just had to stop what I was doing and post when I had the latest CIO magazine stuck in front of me, open to an article entitled, "Needed: Good Writers" (available online). The article makes a number of good points about the importance of writing skills in work settings. But the one that jumped out at me noted the finding in a study by the National Commission on Writing that ranked "e-mail as the number-one form of writing in America, followed closely by presentation/ visual writing."
As I've written before, adding graphics to writing can greatly enhance both the clarity and the brevity of the text. I hope this isn't too "male" an example, but think back to sandlot football and how much it helped in getting the play called quickly and clearly to have the quarterback diagram the play in the dirt.