What is the easiest way to fight a common cold by using natural remedies?

There is none: There is no known proven natural remedy or medicine for that matter, that is a cure for a common cold.It should only be that easy!

Homeopathic therapy: While there is no cure for the common cold, many things you can do can reduce it's severity. Drinking plenty of fluids, steam inhalation & gentle gargling can make your throat feel better. There is some evidence for supplemental zinc therapy, and many believe that vitamin c can help as well, but high doses pass right through your body, so 500mg 4x/day should be sufficient, as well as 220mg zinc.

V sxs- not a cure: Tips: sore throat – gargle with warm salt water (1/2 tsp salt in 8 oz of water). Get strep test/culture if very sore. Congestion – saline nose drops or netti pot. For anti-inflammatory effect & mobilizing mucus- homemade chicken noodle soup. Hydrate- lots of water/clear broth/ add honey & asmall amt. Of lemon juice to chamomile tea.. Fever/ pain – acetaminophen/ nsaid’s rest!