+add as contact
If you smoke, give it up. Vape instead if necessary. I heard that your nasal linings can cope with smoke, or a cold, but not both at once. When I smoked my sinuses could take up to six weeks to recover from a cold. Now most are over in a few days.
Boots Cold and Flu Defence spray, or Vick's First Defence seem to work most of the time for me. Use at the very first sign of a cold, or even better whenever you think you might have been exposed by sneezes on public transport or anywhere else. They work by stopping the virus entering your cells.