If it is a minor burn, the skin is just mildly discoloured or u see a few blebs forming, run water over it till the area is cool. After it is cooled you can put antibiotic ointment on the area, and take pain killers for the pain, tylenol, advil (see previous posts for info on these). Keep the area clean with soap and water daily.
Do not burst the blebs, those little blisters that sometimes form, they protect the delicate skin underneath.
If the burn is very painful, gets inflamed, starts weeping or discharging pus, please see a doctor. It is quite common for burns to get infected. If you are in any doubt about how the burns are healing up, please see your doctor.