The key to overcoming fear lies in understanding what fear itself actually is. Fear is not real. Fear is nothing more than a feeling you get when you realize that the story you have told yourself about the future may not come true. In other words, you might think about doing a trick and realize you may be injured if you try it. This means that you realize the potential for a future in which you feel pain or are incapacitated.
Unlike fear, danger and risk are real. They exist, and the potential for injury is something you accept every time you put skis on.
So you have to ask yourself: "Am I not trying this trick because I do not want to accept the danger and risk involved?" If the answer is yes, you have made a good decision based on things that are real. If the answer is no, then you are holding yourself back based only on fear, which is not real.
Realize that this moment is all that is real, and that neither the future nor past exist at this time. Accept that there could be a future that you don't like. Accept that the story you have told yourself about your future is only a story, and you may or may not have control over how it pans out. Focus on what you need to do, be in the moment, and send that shit.