Things that can help get rid of a cold without medicine are chicken soup, Gargling salt water and getting plenty of rest.
Taking a steamy hot shower can also help get rid of a cold and clear up a stuffy nose as well.
You can also sit in the bathroom with the shower running on straight hot water to create a lot of steam in the bathroom which is great for getting rid of colds and clearing up sinuses.
Using vaporizer and some vicks vaporub can also help colds by placing some in your vaporizer or even adding some vicks vaporub to your chest.