Adjust the equipment. Sit up tall and relax your neck and shoulders. Your feet should be flat on the floor. Grab the handles so that your palms are facing forward. Note that some machines have a foot bar that you need to push in order to release the handles and bring them forward. Press your arms together in front of your chest with a slow, controlled movement. Keep a slight, soft bend in the elbows with wrists relaxed. Pause for one second once your arms are fully "closed" in front of your chest. Bring your arms slowly back to the starting position, opening your chest and keeping posture strong and upright.
Try to work throughout the amplitude of the arm movement of the hands.
Make slow controlled movements without jerking and using the force of inertia. This will make the exercise more effective and safe.