Plenty of warm drinks, eg tea made with fresh ginger and lemon, elderberries (I have often posted in this forum suggesting people collect and freeze these berries, google Sambucol, its a cold remedy made from elderberries and costs a small fortune, its made from elderberries, make sure next winter you are prepared, pick your own elderberries!)
Paracetamol, tea as above, other warm soothing drinks & nourishing soups, see Winter Warmer recipes, for blocked sinus/stuffy noses Olbas oil or Vicks and plenty of TLC from those around you, snuggling down with a cosy blanket, watching a good movie.
Get well soon x