The document provides instructions for performing first aid on yourself during a heart attack. It describes the symptoms of a heart attack as severe chest pain that radiates to the arm and jaw. It then lists three steps to perform first aid: 1) Do not panic and start coughing repeatedly and vigorously, as coughing squeezes the heart and keeps blood circulating; 2) Take deep breaths before each cough to get oxygen to the lungs; 3) Repeat coughing and breathing every 2 seconds until help arrives or the heart regains normal rhythm. The document stresses memorizing and sharing these steps as they could save lives.