If I have a head/chest cold, I will down pho (minus rice noodles) like crazy. The spicier the better. I can't say if it eases my cold symptoms any faster, but it's such a comfort food for me that I feel better anyway.
Hot toddies work wonders for me as well, especially when I need something to help me sleep (cold pills and the like tend to make me anxious instead of drowsy).
I heat chicken broth with some coconut milk, garlic and ginger, and curry or sriracha if I feel like my stomach can handle the spiciness. I also add some cut up cooked sweet potato and crack an egg or two in there and let it all simmer for a while.