Start thinking like the editors you are trying to impress. Give them what they are looking for, just four things:
First, they want to know what you are responding to.
Second, they want a super-brief summary of your response, no more than a sentence or so.
Third, they want to know what qualifies you to hold an opinion worth publishing.
And fourth, they want to see the key evidence or explanation supporting your opinion.
Don’t add anything else, ever.
Editors get hundreds of letters each day, and one way they sort through them is to look for a reason to stop reading yours. Do you fail to make your point immediately and clearly? If so, you're out.
Are you writing just to signal your virtue, to engage in snark, or to disparage your opponent? If so, you're out.
No editor has time to decipher your poorly expressed intention or wade through a page of attitude. Her time is valuable. Better to look for a letter that’s ready to go.
To create a letter that gets serious consideration, execute the four elements above like this:
First, identify the article by title, page number or link, and date. Check the style the newspaper uses, and follow it. Next, fairly and calmly restate the idea in the article to which you are responding. Don’t do name-calling, and don’t be sarcastic. The more reasonable you present the other side’s case, the more serious people will take you:
In your April 19th editorial “The Mayor Is Wrong,” page C1, the author asserts that Mayor Cottonhead has failed to diminish traffic congestion in the city.
Next, state your response in a few words. Include what qualifies you to offer an opinion. If you're a bona fide expert that's great, but your credential doesn’t have to be profound. It has only to be relevant to the matter at hand:
As a daily commuter into the city from the western suburbs, I have seen firsthand that our highways are less crowded than they were when the mayor took office, and that traffic now moves faster.
Finally, add evidence or supporting explanations:
I attribute this to the mayor’s ridesharing programs near city parks, along with his promotion of bike lanes and mass transit. Even better, we can measure the improvement. Statistics just released from the state transit authority reveal that the average commute time is now down 15 percent from the same time two years ago.