RULE # 1 - Before you take off and go anywhere you should tell someone (a) where you are going and (b) what time you will be back or be arriving at your final destination. Just in case you don't make it back or to your final destination within a certain time a search and rescue (SAR) party will know where to start looking for you.
RULE #2 - Should you become lost or stranded in a disabled vehicle or you're a survivor of a plane crash, it's best to remain with the vehicle or plane. As it will be easier for a SAR party to find you in a stationary position than to look for a moving person or a group of people who have no idea where they are going.
But if there's no vehicle or plane and you are on foot and you have no idea where in the hell you are or which way you should go. Then again, it's best to stay where you are as it will be easier for a SAR party to find you in a stationary position then to try to look for you wandering around aimlessly not knowing where in the hell you are going.
But if you broke RULE # 1 - Failed to tell someone where you are going before you took off.. Then you can skip RULE # 2 and proceed directly to RULE # 3 - DON'T PANIC & LOSE YOUR HEAD, S.T.O.P ! Stop moving, sit down and relax, think where you may have screwed up, Observe your surroundings and try backtracking a little bit to see if you can recognize the terrain. And if you don't, sit down, take a deep breath and admit to yourself... "Well it looks like I'm lost, what should I plan to do next?"
Well for starters you should listen up for signs of civilization. Such as listening for sounds of vehicles, trains, church bells, factory noise, etc that will give you a general sense of direction as to which way is civilization. But if you don't hear anything, then look around and proceed to the nearest and highest piece of ground and from there look for buildings, towns, church steeples, roads, railroad tracks, fences, power lines, telephone lines, etc that will lead you back to civilization. If there's no high ground then climb the nearest and tallest tree.
But again if you don't see or hear any signs of civilization but you see a stream, creek or river, then follow that instead. As it will not only provide you a source of water for drinking but will most likely lead you back to civilization or to some trails or roads that will get you back to civilization.
But should you be on the move and you don't see or hear anything that can help guide you back to civilization and the weather starts to change, the temperature begins to drop and or darkness is quickly approaching. Then it's best to stop and stay where you are for the night and begin building a shelter and getting a fire going before it's too late than to risk getting wet, cold and not seeing where you're going. And as you read on you will not only learn from me how to build a shelter and start a fire but to survive, thrive and to teach others how to do it too.