The Mediawiki formatting page is useful. I hadn't realized you could use some html tags.
After wondering what on earth to put in it, I decided that my wiki is a good place to keep track of favorite books, and to remind me to look for new books by some favorite authors. Also the Amazon reviews of books I know I like are helpful in finding other books that might be interesting.

--I found Your Inner Fish because a fellow browser at a Barnes and Noble store in Florida recommended it. An excellent book!

This is a New Zealand tree fern.