When calling 9-1-1 for help, it is important that you keep the following things in mind.
First and foremost, remain calm. Pay close attention to where you are so that you can give the call-taker your location. Look for street signs, mile markers, mailboxes with addresses on them, the numbers on any residences or businesses, and any landmarks like a church, school, or store.
Try to answer the call-takers questions as accurately as possible. Speak slowly and clearly in order to try and convey the correct information without having to repeat yourself.
Also, remember to tell the call-taker exactly what you observe, If you're not sure about something, tell the call taker that you don't know or that you are uncertain. It is important that you DO NOT speculate about anything you don't have direct knowledge of.
Do not hang up until the call-taker tells you to its okay to disconnect the call. If anything changes after you hang-up, call 9-1-1 again and inform the call-taker of any new information.