Fundamentals...

These are the fundamentals to what you should know if you are about to go out into each environment. These are what you should be prepared for and the little things that are unique to each enviroment that i will be looking into for my 60 second sequence and also for my idents... 

Desert

Stay near your vehicle

Ration water

Carry 1-2 gallons of water

Cover your head and neck

Loosen your clothing so you dont sweat as much

If you find a road stay on it

Keep an eye on the sky

Try to stay out the sun as much as possible

Jungle

Take in the area and get a feeling for it

If lost, find you bearings, it tired then rest and if you feel hungry get food

always take a sharp knife

Survival kit which is proper stocked

Learn to make a fire before you go

Also learn how to catch food

Make sure you wear appropriate clothing

Ocean

Food 

Do not drink the sea water

Firstly shout to see if anyone can hear you

if your on a raft do not leave it regardless if you drop your ore

check your direction and see which way is most likely for civilisation (normally not wind side)

Learn ways to fish, this is always handy 

Mountains 

Always keep checking your direction

Expect the unexpected weather

Find water

Debris shelter are crucial

Food

Makeshift weapons if you forget your sharp knife

Always decide where you are going before you set off

AND ONE FOR ALL OF THESE ... ALWAYS HAVE A PLAN!