Years back, I was required to obtain my CPR and First Aid certifications from the American Red Cross for a part-time job at my university’s fitness center. I’ve renewed the certifications for several of my scuba diving certifications (Rescue Diver and Divemaster) as well. Knowing how to properly handle a medical emergency is, in my opinion, one of the most important skill sets that you can develop. While you will hopefully never need to utilize those skills, quickly and effectively responding to a dangerous situation may save a person’s life. During the course, you will learn how to assess the scene of an emergency, when to call 911, how to determine what care the victim needs, and the signs and symptoms of heart attack, stroke, and common illnesses. If you are already certified, consider brushing up on your skills through either a refresher class or by reviewing your class materials. Courses are offered frequently and typically only last for a few hours. They cost less than $100 (you might even be able to get a discount or have the class paid for through your current job).
You can find more information here: http://www.redcross.org/take-a-class