Use the correct chisel for the job. DO Wear safety glasses or a faceshield. Use the right size of chisel for the job. Choose smooth, rectangular handles that have no sharp edges and are attached firmly to the chisel. Ensure that the cutting edge is sharp.
Dull chisels can be difficult to control and require more effort to do the job.
Check stock thoroughly for knots, staples, nails, screws or other foreign objects before chiseling. Adjust your stance so that you do not lose your balance if the tool slips. Chip or cut away from yourself. Keep your hands and body behind the cutting edge. Use a wooden or plastic mallet with a large striking face on all chisels.