Now, cut your headings apart and study them. Select the most important or interesting items and cull out the also-rans. The next step is to lay them out in decreasing order of importance or interest. You'll probably find that some specific or supportive headings fit under broader general headings, so arrange or group them in that order.
You will wind up with a main heading as below and several supportive headings that fit under them in descending or hierarchical order. Next, study the supportive headings and try to find specific information about each one. Next, list these supportive facts beneath each broader heading in descending order of importance.
We are designing an inverted pyramid of information with the most important topics at the top and the specific information in descending order of importance below. The main reason for this, outside of linear thinking and order is simply: if readers become bored or run out of time to finish the document, they will at least have read the most pertinent information.
Here's another tip: when writing a large project, divide it up into many sections. That way, you can plug in extras you didn't think of at the beginning of the project, remove sections you find don't quite fit and make all the corrections you wish, without having to rewrite the whole document. All you ever have to do is revise one section at a time, without affecting the whole project.
Some word processors like M.S. Word allow such a hierarchy to be created under a "Master Document." That is even nicer as not only can you edit and move sections, but you can move supportive information from one section to the next, up or down, at will. Later, when the project is completed, you can print it out, complete with a table of contents and an index. Yes, the pages will all be numbered in the correct order, and the index will refer to the correct pages.