Below is a link to a very powerful testimony of an Alaskan bush pilot who runs out of fuel and yet miraculously hears a voice and is able to fly to safety. The story is very inspiring and worth reading, but never forget that we all have a story of our own to tell too. We are supposed to witness to others and the best way to do that is to speak of what God has personally done four you in your own life. When you do that, you are a firsthand eye witness, which is always the most credible kind.
Here is the link to the Bush pilot story: