What can you do to take care of wound without any medical help?

Superfast healing: The real question is what not to do that slows down healing. Avoid using alcohol, peroxide, hibiclens, betadine, and bleach solutions. Inflammation ( red, hot, swollen, tender) is important to healing so anti-inflammatories (motrin, advil) are bad. Cover the area with a clean dressing changed every other day and protected from trauma. Antibiotics do not help healing unless it is truly infected.

Local hygiene: Wash it with soap and water and at the minimum apply antibiotic ointment to keep it moist. Cover it with some type of a secondary dressing. Make sure your tetanus status is up to date.