When using a scooter with a broken foot, it is important to take certain precautions to prevent discomfort. First, make sure to adjust the scooter's handlebars and seat to ensure that you are in a comfortable and ergonomic position while riding. Additionally, wear sturdy and supportive footwear to give your injured foot extra protection and stability. Avoid putting too much weight on your injured foot while pushing off on the scooter, as this can aggravate the injury.