A hot toddy....shot of whiskey, squirt of lemon and drizzle of honey. I use a short glass and put in the microwave for 30 or 40 seconds. Curl up on the couch under a quilt and sip. After 2 you won't care if you have a cold or not. lol
Really, the fumes do help clear your head etc.
Don't drink or eat dairy products....it produces phlegm.