Once your form is perfect, try what Rufa calls the "T-stabilization" push-up: Get into push-up position, then do your push-ups with one arm raised out to the side, balancing on the remaining three limbs without rotating your hips.
There are  ways to make it harder. Once your form is perfect, try what Rufa calls the "T-stabilization" push-up: Get into push-up position, then do your push-ups with one arm raised out to the side, balancing on the remaining three limbs without rotating your hips.