1. Never, Never, Never, send a pre-printed thank you card. When you send a pre-printed card, you are telling the person receiving the thank you that their gift didn't mean enough to you to even receive a mention in your note. A warm personalized, handwritten note, regardless how brief, tells the guest how much you appreciated the gift and how it will be cherished for years to come. Handwritten notes express sincerity.
4. Be sure to put your new return address on all thank you cards. Your guests will appreciate having your current and correct address.
6. When writing thank you notes, never start the note with "I." Always use "you" more than "I" or "me" in the note.