I guess this is something you can skip if you don't drink, but let me warn you. This could still be important. Even if this skill doesn't help you, it could help someone else. That's what's important. You might run into a friend or a coworker who drank too much. You could the hero of that situation. Although there is a caveat for that. There are some basic necessities that can cure a hangover, but there's also a bit of self customization involved.
Some just need a big, juicy cheeseburger to cure their hangover. Others would throw up if you mentioned juicy cheeseburgers. Find out what works for you. The fun thing is, you can experiment by getting super drunk! Here's my advice though. Eat a big meal before you're drinking, and before you go to bed. Also, don't drink too much. Duh.