Some old time-honored first-aid rules are no more. Some say they could leave you hurting and sore. Here's how to do things better when minutes count -- and you're the designated doctor. For cuts and scrapes, medical doctors no longer suggest using hydrogen peroxide, iodine, rubbing alcohol or Mercurochrome because they all kill healthy cells and slow the healing process. Instead, they now say rinsing with water is best. The same goes for burns. Think butter is good? Doctors say it creates bacterial growth and can lead to infection. Again, rinsing with clear cool water is the best option. And, for bleeding, skip the tourniquet. Apply direct pressure to the wound with a clean cloth, instead. It stops the bleeding and promotes clotting, while still letting blood circulate around it. These are simple guidelines for minor workshop and household scrapes, cuts and burns. For more serious injuries, don't self-treat or delay proper medical supervision. Home-spun first aid is just that, first aid, and is not a substitute for professional treatment.