Know your speed
Impact drivers offer significant power, but not all material require it. The more torque you need, the slower the speed required. You can slow the speed of the tool through finger pressure on the trigger or through a speed selection option, if the driver is equipped with one.
Materials with more give, such as soft wood or drywall, that require less torque will be better served with a faster speed.
If you are doing more heavy-duty, high torque work, such as fastening large screws on deck supports, low speed will make the job easier and faster.