We do stockings on Christmas morning. At my house growing up, Santa filled them. At DH house growing up, his mom filled them. So DH and I agreed to do them on Christmas morning but we never can remember if "santa" fills them or we do, LOL. Makes a difference when you have small kiddos!
I have bought: socks, tiny dolls, Hot Wheels cars, stickers, gum, chocolates, chapstick, small lotions, tea bags (for me), toothbrushes (for everyone). DH bought some small flashlights and got a couple free ice scrapers (for my dad and his stockings).