The five basic survival skills are knowing how to build a fire for warmth and cooking, shelter (both dressing warmly and being able to build a suitable shelter), signaling to allow people to locate you, food and water and being knowledgeable about obtaining both safely and having first aid skills.
The most important survival skills are knowing how to start a fire, how to tell the difference between poisonous and harmless plants, how to keep yourself safe from wild animals, and how to filter water.
They are Fire, Shelter, Signaling, Food and Water (one skill), and First Aid. There are many websites, classes and excellent books that can help you learn these skills.
