Here are fifteen things end users need training, education, or training on. Don't assume anything.
1. How to title your entry so that people understand the context
2. How to search and locate relevant content so content isn’t replicated
3. How to tag content
4. How to write clearly and succinctly
5. How to add attachments
6. How to include an image in the page
7. Other methods of content discovery; most popular, recently updated
8. How to use Rich text Editor or WYSIWYG Editor
9. How to use the Wiki markup syntax
10. How to create a new page or use [new page] function
11. How to roll back history and versioning
12. Understand that diversity of opinion is critical to wiki success
13. How to edit a page
14. How to manage your pages and keep the information current
15. Wiki policies and procedures