Two new rules I propose to be added to the Universal Unwritten Code of Common Courtesy: 

1. Don't answer your phone during a meal with other people.  If you're by yourself, go for it.  But if you're eating a meal with other people, eat the meal and enjoy the people.
2. Don't call a person on their personal cell phone for work reasons.  It's one thing if you're traveling together and you need to coordinate when you're eating dinner.  It's another thing to call a person on their cell phone while they're on vacation or somehow otherwise absent from work.  Nothing is ever important enough to disrupt a vacation.

You'd think these would go without saying, but you'd be wrong. #technology