A classic hiccups remedy involves eating a big spoonful of peanut butter. In the process of chewing and getting it off your tongue and teeth, your swallowing and breathing patterns are interrupted. And hence, the hiccups will be history.
Breathe slowly and deeply into a small paper bag. (Stop if you feel light-headed.) This increases the carbon dioxide level in the blood and makes the diaphragm contract more deeply to bring in more oxygen, which may stop the spasms.
Place a single layer of paper towel over the top of a glass, then drink through the towel. You'll have to "pull" harder with your diaphragm to suck up the water, and concentrated gulping counteracts spasmodic muscle movements.