The first thing to do when you realize you're lost is to stop moving. Panic can lead to poor decision-making and may worsen your situation. Take deep breaths, try to remain calm, and remind yourself that you can handle the situation.

If you have a general sense of where you came from, try to retrace your steps. Look for familiar landmarks or any signs of your previous trail. However, if you are unsure about the right direction or don't have a clear trail to follow, it's safer to stay put in one place. This will make it easier for search parties to locate you if needed.

If you have a whistle, use it to make noise periodically. Shout for help, but avoid exhausting yourself by yelling for long periods. Create signals for potential rescuers, such as building a large "X" out of sticks or laying brightly colored clothing on the ground. Any reflective items, like a mirror or a metal container, can be used to catch the attention of search planes or helicopters.

Take inventory of your belongings and assess your available resources. If you have a map and a compass, try to use them to get a sense of your location and the direction you need to head. Conserve your food and water as much as possible, rationing it for a prolonged stay.

If you know there's a water source nearby (a river, stream, or pond), head in that direction. Water is crucial for survival, and staying hydrated will increase your chances of making it through this ordeal. Regarding shelter, if you have to spend the night, look for a natural shelter, such as a cave or a dense thicket. Insulate yourself from the ground to retain body heat and protect against the elements.