Yesterday, I had the chance to complete a refresher course on CPR. It has been several years since my last course and 26 years since my EMT training. The course covered pretty much all that I remembered, including chocking and using an Automated External Defibrillator (AED) device. The only difference was the inclusion of hands only CPR and the introduction of the song, Staying Alive, which we were told if we gave CPR to that rhythm that that pace would be enough pace in order to help.
Maintaining a level of knowledge about safety and basic life support is very important because in the event of an emergency, when your body is stressed, you will default to your level of training and practice.
According to the American Heart Association, 75-80% of all sudden cardiac arrests happen at home, so don't forget to share that knowledge with your family, so they can assist you in the event of an emergency.