You know--because you've heard it so many times before--that you don't have a second opportunity to make that first impression. But one more thing, another mantra, should be as popular: Don't overdo it. To be more precise, don't wear something you've never tried before. It's one thing to make your date look at your clothes, but the last thing YOU want is to wear something that will make you concentrate on your clothes. Your first date is not a time for added stress