Here is a list of WordPress site planning documents. I have put them in the order that I recommend using them. However, all of them have valuable information.
- Site Master Plan Worksheet V1 (PDF) Site Master Plan Instructions (From Lorelle WordPress School)
- WordPress Publishing Guide Checklist 2015 V1 (PDF) How to publish a Page in WordPress (From Lorelle WordPress School)
- Site Structure And Organization Chart (PDF) (From Lorelle WordPress School)
These are all part of Lorelle’s Word Press School. Great tutorials on building WordPress sites. A little dated but most of the content here is general in nature.