One thing you can do to stop getting kickbacks while operating a circular saw is to ensure you work the machine with your two hands firmly gripping the handle. Also, maintain a firm stance while cutting. Ensure the workpiece is firmly held down and carry out all cutting operations on a flat surface. Carry out regular checks on your saw blade to ensure none of the teeth is broken or distorted in some way. Do all this, and you can be sure the rate at which you experience kickbacks while working will reduce considerably.