Whenever you cook food in non-stick utensils, never keep the gas flame high. High heat can damage non-stick cookware and cause scratches on it.
Whenever you clean non-stick cookware, use a soft sponge. Using a hard sponge can cause scratches on the utensils.
Whenever you keep non-stick utensils in the cabinet, keep a tissue paper between them. This will prevent scratches when the utensils collide with each other.
Whenever you cook food in non-stick utensils, avoid using stainless steel utensils. If you have to stir something, use wooden spoons etc.
Be careful while washing non-stick utensils. Wash them gently and only after they cool down. This will prevent them from getting scratched.