In my view time is the best remedy for a cold.
On avaerage a cold for me lasts about seven to ten days.
Stay home so as not to spread the cold virus around your workplace or community. Drink fluids, I like to drink lots of strong black tea, soups, and treat the cymptoms like aching muscles with paracetamol, advil, or tylenol.
Other than that there is little one can do. But watch that the cold doesn't become a chest infection leading to Bronchitis that then needs to be treated with help from your doctor.