Figure out the basics of your story before you start writing your treatment. Know how your story will begin and end.
Write out your story from beginning to end, giving all of the highlights, but skipping the detail. Do it like you’re describing a good movie to a friend. Make sure events follow in logical sequence.
Use a conversational tone with as little dialog as possible. Be concise. Remember, you’re not telling the whole story, you just want to tell enough that they ask for more.
Be creative as you like as you write a treatment. It’s where you really get to tell your story without worrying about the structure and formatting required of a screenplay.
Make a treatment 5 to 10 pages long. Write in present tense with character names in capital letters. Double space and leave four to six spaces when there’s a location change or time lapse.
Register your treatment with the Writers Guild of America to protect it from theft. If that’s not possible, have it forwarded by an agent or attorney in order to leave a paper trail.
Number your pages at the bottom center or top right-hand side of the page, 1/2 inch from the top and side. Center the title on a cover sheet and place your name, address, email address, phone number and Writers Guild of America registration number underneath it. Fasten it with a staple in the upper-left corner.