Till I Collapse - I chose this motivational song because it's about going all out, to the point where you collapse. Too many times we set a dream or goal and fail to achieve them simply because we didn't give enough effort. Many will say they tried their hardest, but the truth is that very few people really give it ALL they got. Even when you think you can't give anymore, you still have more to give and it's that extra effort that will make all the difference in your life.
When you can honestly say, "I gave it everything I had. I held nothing back" and still failed to achieve your goals, know that with that same mentality, you can go at it again, perhaps using a different strategy, and will accomplish your goals because you have proven you're worthy of it. At that point, it is just a matter of time.