Houston Chronicle Letters: Rebutting Evolution Deniers
Although I'm a big fan of blogs, I really believe the best way for any citizen to share an opinion about anything is to write a letter to the editor. I've had letters published in the New York Times, Chicago Tribune, USA Today, and Los Angeles Times, to name a few, and I'm sure more people have read those letters than have read any of my other writing. Three Letters in the Houston Chronicle are particularly impressive. If you have views you'd like to see reach a larger audience, write a letter to the editor of your local paper.
UPDATE: Only hours after I recommend letters to the editor, I come across this story of a woman who was killed because of the contents of a letter to the editor she wrote. And in comments, Paul Noonan mentions that a weirdo started contacting him because of one of the letters he wrote. So write at your own risk.