Pages in the site load in a reasonable amount of time. The site is consistently available and load without problems. The design elements and features on the site are easy to use and do not detract from the site's usability. The site's title tells you something about its content. The content is updated regularly.
Graphics are relevant to the content and appropriate.
Links to other sites are regularly checked to make sure they're live. Here are the guidelines used by three indexing projects that have been around for a long time. Be sure to check out what each has to offer. Lots of our links come from these projects, in fact. It indexes over 7,300 websites, providing subject access and reviews to their content.