The American Mountain Guides Association and Outdoor Research have come together to create a video on avalanche beacons and the morning beacon check. Arguably, this check is one of the most important parts of the day. If your beacon doesn't work, you're not going to be found if you get avalanched, and you certainly won't be able to find your friend if he gets avalanched...
Check out the video below:
Here is a good process for completing a beacon check:
1) Turn on the beacons and confirm that there is power. Each individual should state their battery life. Batteries that are at less than 80% should be changed out. Rechargeable batteries are not as good as off-the-shelf batteries as they appear to have a lot of power but then lose it quickly.
2) Everybody accept for one person (the leader) should switch their beacons to search mode. They should see if they can "see" the person in transmit mode and the distance on their beacons. Don't touch beacons together when you practice this as direct contact can fry the circuits.
3) The team should turn their beacons back to transmit. The leader can then switch his beacon to search and have the members of the team file by as he checks that he can "see" them with his beacon.
4) Once this is complete, one person should watch as the leader turns his beacon back to transmit.
5) Beacons can be stored in the beacon harness or in a pocket. If in a pocket, the pocket should be integrated (so that it can't tear off) and it should have a zipper.
6) Note that cell phones, Go Pros, radios, or other electronic devices may adversely impact the effectiveness of a beacon. These devices should be stored away from the beacon.
Your avalanche beacon is your life. Make sure that it's on and that it has been adequately checked before going out to ski!
--Jason D. Martin