Hammer nail through a wooden ruler. Hang picture on that nail. Line it on the wall where you want it. Remove picture, push in nail to make an indent. Remove ruler, hammer another nail into the wall Hang your perfect picture up.
Use dawn to make ice packs! Partially fill a ziploc and seal then throw it in another bag to be safe and freeze. It stays cold longer than ice and is a great flexible ice pack! Equal parts water and rubbing alcohol work too.