You might want to include what it is you're complaining about and how they can make whatever it is you're talking about better.
The nature of the complaint
When you write your complaint letter you should advise management of the problem. You can also include how you would want to problem resolved.
The purpose of a complaint letter is to notify/inform a person, company, or organization that a problem exists; and to advise the party what action (if any) you expect them to take.
The best way to address a comment or complaint is directly. If the comment or complaint was made in a loving way as a gesture of help, then you might want to tell the person you will take their suggestion into consideration. If it was made in a rude or incomplete manner, the you might have to ignore it.
A statement of action you want taken to resolve your complaint
I don't usually provide a letter with my rent payment, but if you are late on your payment you might want to include one with your check. Just explain why it is late and what you are doing to solve the problem.
When claiming back pay, you will want your letter to include why you feel this money is owed to you. You will want to also include the hours you are owed for and at what rate.
That's a big complaint, might want to consider visiting the forums on http://thegreatmodel8.net
License, registration, and proof of insurance. You might want to include a notarized letter stating they are transporting the car for you.
Then contact the company through their website and make your complaint.
He complaint about the watchman.
You could write a letter to the principle, but make sure to make it smart! Write out exactly what you want to change, and get other people to sign it, if it is good, and if other people sign it, they will do something.
If you want to include all geological features, a Yardang(a sharp-crested ridge carved by wind erosion from soft but coherent deposits) might be considered a "landform".