When you know how many points you want to make in a document, write that number in your topic sentence. For example, you might have five components to the new sales program or three reasons why your department should make a change. Adding a number to the topic sentence has several advantages. First, you quickly create an organizational mindset and give yourself permission to just start writing. You know where you're going and you know how many points you're going to write about.
And, as a bonus, you save your readers time. Because you've created a framework for your text, they'll find it easy to skim your paper, reading just the major points or diving deeper into the details, as necessary.