ScatteredGenius.com

Tropes are devices and conventions that a writer can reasonably rely on as being present in the audience members’ minds and expectations. If a trope gets used too much, then it becomes clichéd. The word cliché means stereotyped and trite. In other words, dull and uninteresting.

Home Page - Television Tropes & Idioms

A lot of ‘no doy’ stuff but interesting to see lists of it all in one place. A good resource.