Disclaimer - this only makes sense if:
1. You have been to/in Japan
2. You spend time with old Japanese people (including sensei)
3. You are in a strict style of Japanese arts like a Koryu art
4. You are Japanese

Enjoy!
http://www.youtube.com/watch?v=bc6v8IUe_0g&search=how%20to%20eat%20sushi