Overall, a good popcorn movie, but fairly low marks for survival skills.
The only somewhat helpful tips that someone might've gleaned:
-- Rescue, if it comes at all, isn't always immediate.
-- Always keep your seatbelt on during an airplane flight.
-- Airplane fuel can be repurposed for torches, etc.
-- Makeshift spears can be fashioned from fire-hardened sticks.
-- If you wear glasses/contacts, have a second pair available.
As to actions that were not particularly helpful to emulate (meaning most of the movie) the worst offenders IMO were:
-- leaving the plane in the first place.
-- not making a snow shelter.
-- trying to cross a high ravine by having a guy connected to an ineptly tied clothing-bungee jump across it.
-- falling into an icy stream, but then not attempting to make a fire ASAP upon getting out. (Liam's character must've been superhuman. His teeth weren't even chattering!)