A perfect punch uses the whole body in a single flow of motions. As you unleash your attack twist your hips and shoulders to make it truely devastating. Keep your attack close to the body as to avoid telegraphing your movements to your opponents. Remember to exhale to exert more force while striking. Proper breathing is an key element in any fight. I will elaborate more on this as I continue my lessons.
This is an example of how to make a proper fist. Your pointer and middle finger should make a flat surface. That surface is the optimal striking force to deal a massive amount of damage while sustaining very little. Undoubtedly it will take time to get use to, but will keep your thumb and other fingers from taking on unnecessary damage.