In some countries, always open a present straight away. In others, accept it gracefully but put it away unopened. In some countries, always include a card, even if you're personally handing over the gift. Oh, and if you bring someone flowers in Holland, never remove the paper or plastic wrapping. People will think you didn't buy them, but picked them on the way over.
Pictures speak a thousand words.
Plus, pictures do not add cost to your translation bill. But some pictures are not as international as you might have thought. Often, in email conversations, you would like your questions to be answered yes or no. It does not mean yes or no. Mu means I cannot answer your question because both yes and no would make me look bad.