Locate Scanner Frequencies for Amateur Radio (Ham), Public Safety (Police, Fire, EMS), Businesses (Towing, Taxi, Communications, etc.): Radio Reference.com
Great Resource! Ham Radio Cheat Sheet from OffGridSurvival.com
Locate Ham Repeaters in your area: Locate Ham Repeaters
During disasters or other emergencies, ARRL NTS is used to communicate critical information for saving lives, property and to inquire about status of disaster victims: ARRL NTS (National Traffic System)
Radio Monitoring- How to Guide
Shortwave Radio Listening:
A shortwave radio can receive radio transmissions on frequencies between 3 and 30 MHz. These frequencies have the ability to “propagate” for long distances. In most cases, you can receive many stations using the antenna that comes with the radio. To receive more distant stations, you can use an external long-wire antenna. A shortwave radio with SSB will allow you to monitor the Nation Nets.
Tecsun PL880 Shortwave Radio with SSB
http://www.hamuniverse.com/shortwave.html
Largest source of public safety, aircraft, rail, and marine radio live audio streams
Consider listing http://www.websdr.com as a resource for listening to radio traffic world wide. If you happen to know another language it is a good way to keep your linguists skills sharp by tuning into various sites. Also it was good for listening to chatter after the latest terror event in Paris. Something to consider………