Some seasonal tips

Hangover prevention. If you have drunk much alcohol, a way to avoid being sick the next day is to drink a lot of non-alcoholic drinks, especially fizzy ones.

Cold and flu. I don't know why people stuff themselves and their children with so many medicines. When I was little my mother used to give me a drug if I sneezed once, and I seemed to be always ill. What I do now, if I have a cold or cough or even if I've already developed a high temperature (which happens rarely), is simply increase my intake of orange juice, lemon juice or other rich source of vitamin C. My cold-related symptoms disappear almost immediately. The best thing is to strengthen the natural defences of our immune system. Drink a lot of orange juice as a matter of course, and increase it if you feel you are developing a cold or influenza.