Which tooth ? As a general rule, you want to avoid rinsing and gargling as to not disturb the blood clot and any sutures. Don't brush that area while it is healing, and eat soft, bland foods. Difficult, surgical extractions will require more TLC than a simple loose tooth. Discuss your concerns with your surgeon.
Soft diet. Don't use any suction in the extaction site. That is don't smoke, use a straw , spit or rinse vigorously for a couple of days. Eat soft foods and drink using a cup or glass. Avoid anything extremely spicy or extremely hot foods or drinks.