Before you go anywhere where you might get lost in the wilderness, tell someone where you are going and when you are coming back. I live near a vast expanse of hiking territory and there are so many fools who go for a hike by themselves and then don't tell anyone. It could be 3 days before anyone even starts looking for them, because no one even knows they're missing. The movie "127 Hours" was a good example of what happens when you go wandering without telling anyone.
Good question. I am curious to see what kind of replies you get.