Step 1: Bandage
You've wounded yourself. You tripped while hiking and skinned your knee or you cut your hand rock climbing. You need a bandage.
Determine the size of the wound to be covered. Make sure the wound is clean of dirt. If possible use antiseptic. Cut a length of gauze and fold it to the size of the wound. Then tear a piece of duct tape and place the gauze on the sticky side of the duct tape. Place the bandage on the wound with the gauze covering the wounded area.