Rest as much as possible. Plus Zinc and B complex supplements, but you need to start then at the very first sign.
What things can you do/take when you feel a cold coming on?
I take Alka Seltzer Plus when I feel a cold coming on. It's not a cure but it reduces the symptoms better than anything else I've used.
Start the 12 hour Sudafed pills, and keep your head dried up . . . .
Works for me.
Rest and vitamin C combined with cod liver oil capsules ( 2+2 of em )
Rest and I like the "Emergen C" brand of fizzy drink to kind of boost my immunity.
Increase your genetic deck,
and reverse your center of gravity.
Circulation has been compromised.