I'll state now that I don't know too much about temple etiquette- this is just a little bit of what I learned from the locals in Taiwan. If you note any mistakes or would like to add something, feel free.1. If there is more than a single entrance to a temple (usually there are three), never take the main entrance. The Chinese say that you must enter through the longmen (Dragon Door), usually the door on the right, and exit through the Humen (Tiger Door), the door on the left (your right as you exit). The center entrance is for supernatural beings (meaning not you).2. When entering temples, there will be a block/step that you must step over. Never step on top of it.3. Be respectful of worshippers there.