"Hey, you got a minute?" That's a question - not a demand. Don't get angry with the interrupter if you answered, "Sure!" to their question. General rule: If you cannot eliminate the interruption, make the interruption as short as possible.
This interview of John Donahoe, president and chief executive of eBay since March 2008.
Busy people have two options when they decide how their workdays will go: they can choose to be reactive to urgent demands on their time, or proactive about focusing on what they decide is important. The only way to actually get things done is to mitigate the urgent to work on the important.