A professional etiquette consultant once told me that if someone spends more than fifteen minutes doing something for you, that person deserves a written thank-you. How true!

Even if the person's efforts took less time, but are appreciated, let him or her know. A written thank-you takes only a few minutes to write, but the recipient will remember it for a long time after. So worth it.

Some people feel self-conscious about their writing skills. Please don't worry about this. All you need do is write sincerely. You don't have to say anything more than, "I wanted to let you know how much I appreciate the way you resolved [such-and-such] problem for me. You were professional, kind and effective. I plan to continue to shop at [your establishment] for a long time." Of course, a note to a superior about especially courteous or helpful service will probably be appreciated even more.

A thank-you note will also help you stand out from the crowd because, sadly, not many people take the time to write them anymore. I'm OK with emails, as well, but a written note carries that much more weight.

A note on notes: Choose blank paper or cards, rather than those imprinted with the words "thank you." Classic etiquette holds that this pre-printed sentiment is lazy. It is, however, better to use a pre-printed card than not to write at all.