I've had some tough experiences in life. But what's really helped me pull through is a martial ethic of perseverance and strength.
I take a martial art (kung fu) and the physical exercises have so much analogy to real life. We do stretches, lots of pushups, situps, and we also spar with full-body padding. Everything is temporary in life, even pain (especially pain). If you work with the pain and listen to it, you can grow and learn from it. In fact, when you are relaxed and centered, you become an excellent fighter because you can see what you're opponent will do next and counter them purely on instinct.
I guess I feel I can overcome most challenges put in my way these days with this ethic. The dragons and demons which most warriors face in epic poems can be seen as analogies for our everyday fears. Once we conquer our fears, we can become better people.