What is the best remedy for a cold in general?

Rest and fluids: Get some rest, take fluids, take precautions to avoid spreading it to others; take tylenol (acetaminophen) if you have fever; you may take over the counter medications if these help with the symptoms but do not expect any of these or other treatments to shorten the duration of illness.

Vit D3, vit C, fluid: Lots of fluids, sip hot decaf tea. Vitamins help. D3 10000 iu for a couple days, vit c 500 mg twice a day. Rest and listen to your body.