Answering the call
It says in one part: "I do not answer the call if I do not know who is calling" and it made me think about it. I always answer my phone, even if I don't know who is calling. Okay, if I'm avoiding someone I will not answer the phone, obviously, but in normal situations I will always answer my phone if I can (when not in the cinema, school and etc.)
Actually, at one point I "lost" $1000 by answering the phone the wrong way! A local radio station had sort of a contest going on for a while and they were calling random people. If you answered the phone with "I'm listening to <their name>" you would win $1000, if you answered your phone with anything else, you wouldn't get anything. I answered my phone with "Hello?"