Build an extension with a user model built in, such as one's Google account, automate on installation. Alexa's toolbar icon is dynamic, and so is yours. Users click once to access the popup, select from various checkboxes, rating the site's dimensions, and clicking away— 3 to 5 clicks. There may be a textarea which activates a star rating system, or a karma voting system, after she's typed in 100 characters.
Compete with Alexa, sell for 1BB to Google.
