You are excited to go to the first holiday party of the season. Your dress fits, without wearing your too-tight Spanx. Check. Your husband is dressed and looking suave. Check. The baby-sitter arrived on time and has the kids under control. Check. You grab your purse, coat and hostess gift. Uh-oh. Seriously. Can I ever be on time? Just once. They say it’s proper etiquette to bring a hostess gift… who are “they” anyway? Yes, it is polite to show your appreciation when invited