Safety is number one when traveling, no matter what vehicle or how long you're traveling. In this case my vehicle is a plane, an Air New Zealand plane. From Auckland to Japan which is a 10 hour and 50 minute ride.
On a plane you MUST have your seat-belt on when you see the seat- belt light on. No matter what you MUST have your seat-belt on. If you have any phones of devices make sure to put it on airplane mode as Wi-fi is unavailable on a plane, but you can use Bluetooth. Make sure those small devices are kept in your clothing or in your care-on bags... Also if you're a bag is with you and the plane starts just put it under the seat in front of you.
If your plane is falling down fast then put your feet firm on the ground and lean your head on the seat in front of you... If there isn't a seat in front of you then place both of your hands on you head and stay calm.
For more information check out the Air New Zealand safety videos:
Air New Zealand ‘Men In Black’ video
Air New Zealand ‘Safety in Hollywood’ video