Soothing substances:
Herb tea, very warm (not hot) with a good amount of honey stirred in.
Hot jello—a cup of very warm water with a couple spoons of jello mix added.
I have found vanilla ice cream to be very soothing on sore throats.
Take lots of echinacea and vitamin c.
Finally, it is quite vile-tasting, but three tablespoons of apple-cider vinegar and a couple tablespoons of maple-syrup of honey added to a cup of water. I usually use maple syrup (well, artificially-flavoured) since I drink it cold (and quickly), but if you decide to have it warm, then honey might be a better option depending on your preference.
Also, if you can get in contact with some granulated xylitol (or find it in gum), that coats your mouth and throat, deterring cavities, but also protecting your throat from infection.