Clark was on a plane pulling into the airport gate recently when a man using the walkie-talkie feature of his Nextel phone started screaming into his device. Everyone started looking and commenting on how inappropriate and annoying it was. Of course, the guy had no idea. And that is par for the course. A University of Michigan study found that 60 percent of people find public cell phone use a major irritation. Clark would like people to use better manners when they are on the phone or using devices. It's unlikely to happen, but we all know it can be a major distraction in meetings and other situations. Other countries have caught on to the importance of cell phone etiquette. In Hong Kong, most restaurants require that you leave your cell phone at the front of the restaurant before you sit down. Furthermore, the Insurance Institute for Highway Safety reports that using a headset with your cellphone in the car does not make you safer. You are four times more likely to get injured using a cell phone than if you were driving without the cell phone. So, try to stay off the phone in the car and when others are around. You will pay less in bills and others will thank you for it.