You can find general help on most topics by going to Wikipedia Tutorial. Here are some things that are in the tutorial that we found particularly usefull.
- Editing: Help
- External Links
- Internal Links
- How to Use images
- How to use tables
- Special characters, mathematics
See also the CAUSE Webinar Using (and contributing to!) the Chance News Wiki by Jeanne Albert and Bill Peterson. You can download the slides in pdf or PowerPoint. Beginning on p. 12 there are step-by-step screen shots of an actual editing session.