When I have a sore throat I drink some warm tea with honey added to it.
The warm tea and the honey helps soothe the sore throat and also helps to get rid of the sore throat if you continue to drink the warm tea with honey.
You can also get rid of a sore throat by gargling some warm water with salt added to it.
Also adding moisture to the air via a vaporizer or humidifier will help with a sore throat since the your throat won't be as dry.