It seems like everyone and their brother has a BlackBerry today. I think this might be one of the most annoying inventions in the last 50 years. Why? Simply this: Every time that I’m at a meeting with someone who has one, they inevitably start checking their email with it. This is extremely rude, and I have no idea how people see this to be acceptable. Hence this tip: When at a meeting, treat your BlackBerry just like it was your cell phone. You wouldn’t start talking on your cell phone in the middle of a meeting would you? By the same token, don’t check your email either, it’s just as rude and unacceptable.