A user clicks "add how-to", and gets a page which looks like this:

Introduction - give a short explanation of your document here.

Purpose

Explain the purpose of your how-to here. Why does someone want to read it?

Prerequisities

Explain what is needed to follow the how-to. Try to be specific about versions you are referring to.

Step by step

Explain how to complete the task here. Make sure people can understand what steps are involved. If you can, include examples and screenshots.

Further information

If there is anywhere else the reader can go for more information on this topic, include some links or pointers here.