4. Distract Yourself
Hiccups have a strong psychosomatic aspect and the problem is that the more you focus on them, the more likely they are to persist. And you know what they say: a watched pot never boils! So the answer is simply to find a way to distract yourself so that you forget about them.
And the best way to do that is to use something that fully engages your attention as this will also help to alter your breathing. Watch a good film, play a game or otherwise do something you enjoy and your hiccups will likely be gone as soon as you come back to the real world.
The other great thing about this method is that while you’re distracted, you’ll be less concerned about the hiccups.