Ginger in any form....now that I'm older I find I get motion sick when travelling. Chai made with soy milk, ginger snaps or the Ginger People's ginger chews all work for me. Better than the drugs did.

But, not to forget, Grandma's wisdom and chicken soup. I believe it was actually shown that the thyme (???) in the broth did help clear the sinuses and, of course, the extra fluids were correct. Even as a vegetarian, you can make up a batch of "chicken soup" with seitan and the spices and feel better, if for no other reason than it is good comfort food.