When you feel like you are coming down with a cold (and you really, really don't want to,) do you have a special home remedy that you swear by?

I used to eat a bunch of garlic when I felt like I might get a cold. It worked (I don’t care if it was a placebo effect, so please don’t tell me that it couldn’t have worked,) but I smelled awful. Do you have a home remedy or holistic recipe that you think keeps a cold from happening?