1. Hushed tones
If you should not talk - Don't talk - the hushed words put me off completely. If its urgent, write it down and show me.
2. Touch - and - talk
For all those of you who have the habit of nudging people to get their attention, well, I don't like it. When addressed by name, I respond, unless I'm asleep or busy with something else. So, if I don't respond, it doesn't mean you can come and tap me to get my attention - I zimply don't like it.