This works for me EVERY time I have the hiccups!
All you need is a tall glass of water!
Now the first thing you do is hold your breath for at least 10 seconds! More if you can! Then BEFORE you breathe again start gulping the glass of water! Gulp as much as you can before you need to breathe again! Then breathe once you're done! Your hiccups should be gone! Like I said, works for me every time!