Consistent compliance with Wikipedia policy is more important than your personal beliefs. Inconsistent compliance is a good sign of activist editing.
For example, if you assert something, and are presented with countering evidence from a reliable source, do you consider changing your position like a reasonable editor, or do you ignore it to argue your position?
When you join a wiki community, be a constructive editor.
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.