The Web Accessibility Initiative, Wakag

Wakag is a web accessibility initiative, which has been adopted by more than 100 and something countries world wide. It's broken up into different sections that focus on four key principles: perceivable, operable, understandable, robust. Some of em will take practice for people who haven't done it before, like using a screen reader. But for the most part, there's anywhere between five and ten or 12 little tests in each section.