Whenever I have a sore throat I will gargle with some Apple Cider Vinegar and within a few days the sore throat is usually almost gone.
The Apple Cider Vinegar is a natural way of gargling and getting rid of a sore throat quickly and it's antibacterial and kills off viruses that causes the sore throat.
You can also add some honey to some warm tea and drink a cup of warm tea with honey and the honey in the tea will help lubricate your throat.
Adding a humidifier to your room can also help keep your throat moist and keep the air in your room moist and not dry.
I also recommend taking some Halls Cough Drops as they have helped soothe my sore throats as well.
Gargle with some salt water too and take a steamy shower or sit in the bathroom with the shower going on as hot as it can get to provide steam to your throat.
Staying hydrated with some warm tea or plenty of water and even just eating a tablespoon of honey can also help relieve sore throats.