Do: Keep both hands above the table
Don't: Keep your hands on your lap
Note: When not using utensils, rest your wrists or forearms on the table (and never your elbows).
Do: Smash potatoes with a fork
Don't: Use a knife to cut potatoes
Note: Using a knife means you think the potatoes are not done.
Do: Keep your chopsticks horizontal
Don't: Leave them sticking upright in a bowl of rice
Note: Upright chopsticks in a bowl of rice is how food is offered to the dead. It's considered bad luck.
Do: Take off your hat, coat, and sunglasses indoors
Don't: Blow on your food
Note: If it is too hot to eat, take the hint and wait until it cools.
Do: Accept a dish or glass using both hands
Don't: Accept a dish or glass with one hand
Note: It's more respectful.
Do: Enjoy "sobremesa"
Don't: Rush off straight after your meal
Note: Sobremesa is the period right after a meal when family and friends share conversations or anecdotes. Take your time!
Do: Use your hands to eat tacos
Don't: Use a knife and fork
Note: It's considered snobby to use cutlery. Do it like the locals.
Do: Gifts of flowers must always be in odd numbers
Don't: Give yellow flowers
Note: It is also not recommended to give thirteen flowers, as thirteen is considered to bring bad luck in Russia as well as in many other countries, and yellow flowers symbolize separation.