In my opinion, the best way to cure hiccups is by holding your breath while lying down for about ten seconds and then breathing out slowly. You can also try taking water fast from the wrong side of the glass and also not thinking about it helps.
This might sound weird but it always works. Take a glass of water and put a paper towel over the rim so it covers the opening. Sip water through the glass without removing ur mouth until the water is all drank.
If you dont want to go through all the other contortions just take a teaspoonful of sugar, try to swallow it before it all dissolves. Ive used this for my kids for years. Now they are old enough they reach for the sugar themselves!