I've tried the spoonful of sugar one to cure hiccups on my DP,when he was going through a phase of keep getting them. It worked. Also,the pinch of salt on the tongue one for night cramp. I go through phases of getting agonising cramp in the back of my thigh at night. About a year ago,it woke me up and as I was hopping around the room,yelping,my DD came in with the salt cellar. She told me to stick my tongue out,and she shook a small amount of salt onto my tongue. I swallowed it down with a drink of water and unbelievably,after about a minute,the cramp had gone. Coincidence? I don't know,but I have used this trick successfully several times since.