Apple Cider. We didn't drink it while I was growing up - but Tyler is a huge fan, so I now make a point of having some around in December. The flavor can be a bit too strong for me, so I usually pass on it.
For the inevitable cold (which I currently have, myself) there is no substitute for herbal echinacea tea. It melts away your sore throat and you feel refreshed! I highly recommend it for you singers (and non-singers, too) who want a healthy throat and immune system this winter.
What drinks are a must for you this time of year?