This would be your biggest missed opportunity: could be a specific item you didn't buy and regretted, a style that you realized too late was ideal for you -- anything that haunts you to this day.

Here's mine. When I was married, Chanel was a client of my husband's, and people doing business with their corporate headquarters were given the privilege of shopping in their company store. Now, the company store sells items not at a discount, nor at wholesale, but at cost. Cost!

At that time, I was a beleaguered grad student and mother of a preschooler, with no interest in or time to think about style. A candidate for What Not to Wear. I had no idea what to even ask for, so he did the best he could and brought me a couple of fragrances and a makeup brush or two, and that was that.

I know, I know.

Okay, as I mop up my tears, I turn this over to you...