If you know that your money clip, tweezers, watch, or necklace is going to set off that metal detector, group those items into one carry-on that you can send through the x-ray machine. Youre already going to get slowed down by the guy who has not flown since 9/11, and is begging for the full body pat down, so save some time by
having your items ready for inspection. Itll save you more than a raised eyebrow from airport security