Sprinkle salt at doorways, window sills, and anywhere else ants sneak into your house. Ants don't like to walk on salt.
Extinguish grease fires.
Keep a box of salt near your stove and oven, and if a grease fire flares up, douse the flames with salt. (Never use water on grease fires; it will splatter the burning grease.)
If you soak new candles in a strong salt solution for a few hours, then dry them well, they will not drip as much when you burn them.
Arrange artificial flowers.
Artificial flowers can be held in place by pouring salt into the vase, adding a little cold water and then arranging the flowers. The salt become solid as it dries and holds the flowers in place.
To fill nail holes, fix chips or other small dings in white Sheetrock or plaster walls, mix 2 tablespoons salt and 2 tablespoons cornstarch, then add enough water (about 5 teaspoons) to make a thick paste. Use the paste to fill the holes.
Deter patio weeds.
If weeds or grass grow between bricks or blocks in your patio, sidewalk, or driveway, carefully spread salt between the cracks, then sprinkle with water or wait for rain to wet it down.
Kill poison ivy.
Mix three pounds of salt with a gallon of soapy water (use a gentle dish soap) and apply to leaves and stems with a sprayer, avoiding any plant life that you want to keep.
Tame a wild barbecue.
Toss a bit of salt on flames from food dripping in barbecue grills to reduce the flames and calm the smoke without cooling the coals (like water does).