You can get ideas for content to create for your site – and optimise your content to get more visitors – by doing keyword research – just like you did for the pages on your site.
This video shows you how to do research for content topics (it’s slightly different to your main keywords).
You may need to right-click the following links and select Save Target As/Save Link As to download the file to your computer
The tool I use (as ever) to speed up the research process is Market Samurai. You can get a free trial copy by clicking here.