1. The way you position your utensils sends specific signals to the waitstaff
2. Resting your chopsticks across your bowl is considered a breach of etiquette
3. How to properly eat soup
4. Letting your chopsticks stand in your rice bowl is considered an offering to the dead
It's an absolute no-no.
5. There is a proper way to hold and place your utensils down
You shouldn't hold your knife like a dagger or place the cutlery back on the table once you've picked them up.