What to do and not to do while travelling to other countries
Don't give an even number of flowers as a gift: "That's for dead folks. Proper bouquet will have 1/3/5/7 flowers." Don't rely on a credit card: "There are lots of places which only accept cash." Don't assume the people support everything the government does: "Quite often we don't. Don't criticize our government. We do it a lot by ourselves, we don't need your help in that."