Web accessibility is the goal of making web pages easier to navigate and read. While this is primarily intended to assist those with disabilities, it can be helpful to all readers.
While editing articles, keep in mind the goal of making Wikipedia web accessible. All users, regardless of ability, should be able to read, navigate, and contribute to Wikipedia easily.
The Accessibility section of Wikipedia's Manual of Style (MOS) is a valuable resource that provides helpful guidelines. In addition, Accessibility dos and do nots is a quick summary of the most important guidelines for editors.
WikiProject Accessibility is a group of editors promoting better access for disabled and other users. For more information, such as what you can do to help, see the main project page.
There are three basic steps to building a topic list for Wikipedia: the first is to search Wikipedia to make sure it doesn't already have a list on the subject. The second step is to hunt down every word you can find on the subject, from your own memory, books, web directories, dictionaries, etc. Surround each term with double square brackets, and save the page.
Because Wikipedia has become so extensive, don't be surprised if most or even all of the links turn out blue (those are live links, each leading to an article on Wikipedia). Dead-end links are red, but don't remove them, because they show what articles Wikipedia is missing — anyone can click on a red link to create an article on that topic. The third step is checking each live article in the list for links to related topics. When you find one, add it to the list.