In case of cough, wrap lungs warm
It always helps me to keep my lungs warm when I cough. Meaning: Two T-shirts at night and maybe even a hot water bottle on it, undergo a vest during the day or just a second T-shirt.
I came up with the idea because I always wondered how all this lard, potato and so on (tried everything, in the morning always waking up in a giant bogey) against cough (should) work well.
Other tips such as putting onion in the bedroom, taking cough syrup and so on (with TheFruitAndFlowerBasket there's a whole category for such tips) should be parallel without interactions ;-) Nevertheless, everything depends on the question whether the lungs are nice and warm is packed.