Sushi Etiquette from a Gaijin

Eat your sushi in one bite. Two bites is acceptable, however, don't put the sushi back on the plate if you bit it in half already. Once you pick it up, eat all of it and keep uneaten parts in the chopsticks ready to be consumed.
From wikihow- http://www.wikihow.com/Practice-Sushi-Etiquette