Choose a Key Area on the home page. That will take you to the home page for that key area, which provides a high-level view of the content available.
Use the the sub-topics and tags to narrow your focus or click on the tabs at the top to view a specific type of content (like 'News' or 'Resources') in more detail.
All content on the site is categorised through the use of tags. You can sort content by clicking on Show Tags at the right of the screen and selecting or deselecting which tags to include.
There is also a Search box on each page to help you find content or you may choose to use the Advanced Search function.