Just start typing, and YubNub Auto Complete will find suggestions.
Suggestions are ordered by popularity and a maximum of 10 are displayed each time. Use the arrow keys to navigate suggestions, and hit enter to execute the selected suggestion. If no suggestion is selected, and you hit enter, it will exectute what you type.

Tell your friends!
The more people that use YubNub Auto Complete, the more suggestions it will have in the database, making a better experience for everyone!