Nothing, it will eventually go away...

What AI told me: Hydration and warmth, Gargle salt water, use a humidifier, honey and warm water

I have chose the vitamin route: Vitamin C, glutathione, Vitamin D, plenty of sun, fluids and rest.

A combination of the above and add nasal rinse, nyquil/dayquil, Ibuprofen and sore throat lozenges.

What the heck, I have not even heard of half of these treatments!

Other: Put your answer in the comments