Flashlight/Signal Mirror

When it comes to a flashlight, bring an LED flashlight with good dependability, and extra batteries. You can also have a head lamp for convinces of walking about dark areas where you need your hands for navigation. You can get these at almost any store, and I bet you could even buy one at a 7-11, so I wouldn't worry to much about costs. In addition, always pack a small signal mirror, it doesn't have to be terribly large, in case you get lost.