God forbid that none of us ever got into any situation that would lead to an island where there are no people.Yes, in our time, during computers and the Internet is almost impossible, but it can still happen that the technique, which is available with itself, may break down and not work.Most importantly, if you happen to get to the island, do not panic.Need to immediately look around themselves, and find any objects, all can use to anyone.First make a construction for rain water, any plastic such as expanded, in pre-dug not deep in the sand pit.After what can be watch, that is growing on trees, any fruit.On the shore, the sand can be made out of stones, big word sos, I think that the companion will notice it and help will come.