See you doctor. Wound care instructions should be obtained from a physician who has inspected your wound. Not all wounds are the same and not all will have the same treatment. Generally however the wound the site should regularly be cleansed with sterile saline or a wound cleanser. Deeper more involved wounds with signs of infection may require oral antibiotics. Consult with your physician.
Abscess care. Your surgeon should be giving you instructions on the care of the abscess.
Simple Care. 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.
Ask. Best to ask your doctor or surgeon. Usually daily cleaning with soap and water after removing the bandage, packing the opening with new clean gauze is indicated.