Some Helpful hints

http://sushiref.com/glossary/
A glossary of Japanese sushi terms to help you when ordering in a sushi bar

How To Use Chopsticks
Think of the chopstick as a pair of prongs, the only difference being that there are two separate parts or sticks. One stick is held in stationary position and the other is moved.

1. Take one stick first and hold it in your right hand in the way you would normally hold a pencil. If the stick has a thick and a thin end, hold it so that the thick end is to the top.
   
2. Keeping the fingers in this position, turn your hand inward until the stick is horizontal to the table and parallel to your body.
   
3. Relax your fingers slightly and slide the stick to the left until your thumb and forefinger are clamping the stick at about its mid-point. The thumb should not be bent or rigidly straight. All your fingers should be curved slightly inwards with the middle finger in contact with the underside of the stick and the tip of the middle finger pointing towards your body. The third (ring) finger should be in line with the middle finger but its tip should protrude beyond the middle finger towards your body.
   
4. Now, take the other stick with your left hand and let the thick end rest on the protruding part of the ring finger of your right hand. Slide the stick towards the right, touching the tip of the middle finger and passing under the thumb until the thick end rests at the base joint of your forefinger. This is the stationary position of this stick, and it should be roughly parallel to the first stick.
   
5. Alternately bend and extend your forefinger and middle finger, letting the first stick PIVOT at the thumb. The thin tip of the moving stick will touch that of the stationary stick when you bend the two fingers. Don't hold the sticks rigidly. Hardly any pressure or strength is needed to grasp things at the tip of the chopsticks.

The Dining Method

The Soup
With Miso Soup (misoshiru) or Clear Broth (suimono), you may use your chopsticks to pick out the solid pieces. Feel free to drink the soup as you would a cup of tea. Slurping noises are not considered bad manners, so have at it.

The Condiments
The thinly-sliced pink ginger on your plate is called gari. Eat just a slice between pieces of sushi to re-enliven your palate. The shredded white radish, called daikon, is for cleansing your palate between different orders. Wasabi is the little green chunk of horseradish paste that some often mix with shoyu as a sauce for dipping sushi. If you aren't used to eating wasabi, be forewarned: when eaten full strength, it has an electric effect on the sinuses that can make a strong man weep openly.

Passing sushi and sashimi
NEVER pass sushi to another diner using your hashi. Pass them the plate so they can pick it up themselves. Always pick the sushi up off the plate with the other end of the hashi - the end that doesn't go in your mouth. And of course, never yell "go long!" or "incoming!" and then huck sushi across the table.

Eating sushi and sashimi
Pick up the sushi, turn and dip the fish part, not the rice, into the soy sauce-wasabi mixture, and put the whole portion in your mouth, flipping the sushi so that the fish is on your tongue. Sushi is finger food. It's okay to pick it up with your hands if you like. Sashimi, however, is not. Only use your hashi to eat sashimi.

Sushi bar etiquette
NEVER smoke in a sushi bar, even if there is an ashtray provided. I know, it sounds crazy, but think about it: smoke will interfere with the flavor of everyone's sushi. Therefore, to smoke is to be disrespectful to the chef's work. You may be feeling gregarious after a few shots of sake. If so, offer a drink to your sushi chef. He doesn't expect it, but if you have a drink with him, he will toast with Kampai! (to your health).