Aside from the classic usability tests, you can call upon quite a number of usability tools to test your site's usability. Of course, you don't have to use every single one. Here are some usability tools.

Affinity Diagrams

Affinity diagramming is a categorization method where users sort various concepts into categories.

This method is used by a team to organize a large amount of data according to the natural relationships between the items. Basically, you write each concept on a card and users move the cards to groups based on how they feel the concept belongs with other concepts.