Add a 2-3 drops of lemon juice to rice to keep it from sticking together.
Frosting
After frosting the cake, use a hair dryer on the lowest setting to melt the icing so that it has a shinier and smoother finish. DO NOT overheat. Less is more.
Hot oil
To keep hot oil from splattering, add some flour and salt in the pan before frying.
White mashed potatoes
Add some vinegar and lemon juice to your potatoes before draining to achieve extra white mashed potatoes.
Scaling a fish
Rub some vinegar on the scales of a fish for easier scaling.