2 Birds, 1 Stone
Letters to the Editor and Opinion Columns: Use these two vehicles as a way to spread the word about a particular cause or issue. If you oppose the U.S. space program, for example, write a letter to the editor or an opinion piece to coincide with the anniversary of the Challenger explosion on January 28, 1986.
Keep your eyes open for a story on your topic that already has been printed. If your letter can comment on the story, and still tie into a holiday or anniversary, you have given an editor even more reason to publish it. For example, let's say you feel strongly that the minimum wage should be increased, and you see a story about the minimum wage printed in late summer in a national magazine. Write a letter to the editor responding to the story and stating your opinion. Include the fact that the minimum wage controversy will have particular significance on the upcoming Labor Day. It makes the letter more timely.
For more great ideas on using Letters to the Editor and Opinion Columns that piggyback events see Special Report #14 "How to Piggyback Story Ideas onto Holidays and Anniversaries"

