DEAR MISS MANNERS: I have a longtime friend who seems to consider herself very well-mannered. She writes her thank-you notes on cards and mails them, while I send my thank-yous by email. When I tell her she doesn’t need to do a handwritten thank-you, she says, “My mother taught me to always do it that way.” Of course, that makes me feel “less than” for my emailed thanks. When she comes to visit me, she always brings a hostess gift. It’s very thoughtful, although it’s usually something I can’t use. I appreciate the gesture, though. She knows that my guest bedroom and bathroom are stocked for th…