Is there some kind of "Yelp for websites for blind people"? In other words, a web site for blind people that lets you know whether a given site works with your screen reader? It seems like it could be a big time saver.
WCAG is, from what I can tell, a reasonably good starting point and even attempting to do _some_ things and being generally aware is better than not doing anything at all. Give the guidelines a read, https://www.w3.org/WAI/standards-guidelines/wcag/