1. Calm Down. The most important thing is to remain calm and think clearly. If you start panicking, you can lose control and end up losing your chance of survival. You're not going to do so well if you've driven yourself mad.
2. Look around for safety precautions. Is the area you are in safe? Are there wild animals? Risk of flooding? Establishing physical safety is the first important step.
3.Look for a clean fresh water supply. Start by looking for food, but it is a fact that almost all "lost" people are found in a matter of hours or a couple days. You can live for 2 weeks without food but only 3-4 days without water. If there is no natural source of water, look at constructing a way to collect rainwater.
4.Build a shelter. A shelter provides a home base, somewhere warm and shady to sleep, a place for storing resources, and to hide from animals Try to keep the shelter above ground. This could be a natural shelter such as a cave, or one you construct.
5.Find food sources. There are lots of edible roots and berries, but watch out! Some are poisonous. Only eat them if you are sure they are safe. The best, and most reliable source of food.
6.Evaluate your resources. Do you have a source of fresh water? Do you have a long range radio, satellite phone, or other means of communication? Are there other people? People, if managed correctly, can be your greatest resource.
7. Start a fire. Fire can also be used for cooking, and provide light for you and your rescuers.
8. Arrange rocks or large objects on a clear path to signal for help
9. Try to make contact
10. Never give up. Willpower is what allows people to survive without food for weeks. Without the will to live, you won't. Always envision the great life that you will have, if you give up, that will be the end.