If you cut yourself shaving, dry off the wound and put a dab of vaseline over top. This will create a watertight seal and cause it to instantly stop bleeding.
Use baby shampoo to clean cuts. It’s gentler than hydrogen peroxide which can dry out the skin and make the damage worse.
Never butter a burn. Applying anything oily or fatty, like petroleum jelly, will make it burn hotter. Instead, flush it with cool water.
Invest in CPR and AED education and training, and encourage your family and friends to do the same.