When you travel in the forest, you should stay with your friends. If you walk around only by yourself, you might get lost.
When you lost the way, the most important thing to do is to stay in one place. Don't try to find your friends. Let them find you. You can shout or whistle three times. Then shout or whistle three times. Then shout or whistle three times again. Any signal given three times is a call for help.
When people hear you, they will give you two shouts or two whistles. When a signal is given twice, it is an answer to a call for help.
When you need some water, you have to leave the place to look for it. Don't just walk away. You can pick off small branches and drop them as you walk. It will help you go back again easily.