I attended a refresher course for my first aid qualifications last weekend. Something was mentioned by the instructor that I feel is particularly worthy of passing on.

The task of the first aider is to buy time for the patient until professional help arrives. The acronym DRS ABCD helps us remember these steps:-
D - check for danger to yourself before going to assist
R - response. Can the patient tell you of their condition?
S - send for help - see the following

A – check that the airway is clear
B - check for breathing and a pulse
C - commence CPR if needed
D - use defibrillator, if CPR doesn't get results

It's the "S" step that I want to bring to your attention. Many / most of us carry smart phones. There's an Australian-developed application, called Emergency+, free from the app store, that has hot links to Triple Zero, SES, Police, Crime Stoppers and Health Direct. Emergency+ calculates and displays your location, as a street address, if possible, and as latitude and longitude co-ordinates.

In my opinion, everyone should have this application installed and ready to use. You might not be the one administering the first aid, but you may be able to assist. By saving time in summonsing the paramedics, it might save a life, perhaps that of a complete stranger, or perhaps someone very dear to you.

Note: there's a similar application, called EmergencyPlus. This is the USA version. You want Emergency+