Fi, as usual, has posted some great thoughts on her blog:
When you find yourself in a group of people, before you say anything, look around and think about the people who are there. Consider if any of them have positions of authority over you or if they should be shown honour. For example, I think that it is appropriate for me, a youngish, Western female to submit to men and to show honour to older women and perhaps to non-Westerners.