A sealed envelope – Put in the freezer for a few hours, then slide a knife under the flap. The envelope can then be resealed.
Use empty toilet paper roll to store appliance cords. It keeps them neat and you can write on the roll what appliance it belongs to.
For icy door steps in freezing temperatures: get warm water and put Dawn dish washing liquid in it. Pour it all over the steps. They won’t refreeze.
To remove old wax from a glass candle holder, put it in the freezer for a few hours. Then take the candle holder out and turn it upside down. The wax will fall out.
Permanent marker on appliances/counter tops (like store receipt BLUE!)? Use rubbing alcohol on a paper towel.
Blood stains on clothes? Not to worry! Just pour a little hydrogen peroxide on a cloth and proceed to wipe off every drop of blood. Works every time!
Wrap celery in aluminum foil when putting in the refrigerator and it will keep for weeks.