I work for the tire industry here in Washington D.C. We recommend the penny test, but it's not particularly scientific (and unlike what QueerCents contends, there are no legal requirements regarding the depth of your tread). Further, it's just as important (if not moreso) to check your tire pressure at least once a…

I find a handshake is less about the handshake itself and more about the reaction on your face. Few people will remember the actual physical contact, but if you give them a confident smile and look them in the eye, they won't soon forget you.