Nothing you can see or perceive, that is. Every action you take is going to change something along the road. The experience of doing something, the things you learn, the lessons. I learned a while ago that I have to embrace the failures and shortcomings that come my way to be able to embrace and recognize the opportunities for success. To make an analogy I've heard: if you do everything right to prepare to go surfing and go out to the water, you can't make the wave happen if it's not ready. However, you shouldn't sit and splash in water and get exasperated or you'll miss the waves when they start coming. Chin up man.