How do you keep going?

I dont really know what my question is. Im nineteen, I have a GED, and I flunked out of mage school, which I really wanna finish. I just got fired from my job at walmart and I totaled my car in may. Its freezing out and Im so not looking forward to job hunting. The plan was to save up for the car the the mage school, and finish it all. But I got fired for something so silly, so now Im back to square one. My question is, how do you keep going? What should I do next? Id appreciate stories from your own lives where you've overcome, or straighthonest answers. I feel a lot like a failure right now...