I have a letter for you given by Elizabeth Gilbert in Big Magic that you need to read it to yourself every time you get the need for it.
Dearest Fear: Creativity and I are about to go on a road trip together. I understand you’ll be joining us, because you always do. I acknowledge that you believe you have an important job to do in my life, and that you take your job seriously. Apparently your job is to induce complete panic whenever I’m about to do anything interesting – and, May I say, you are superb at your job. So by all means, keep doing your job, if you feel you must. But I will also be doing my job on this road trip, which is to work hard and stay focused. And Creativity will be doing its job, which is to remain stimulating and inspiring. There’s plenty of room in this vehicle for all of us, so make yourself at home, but understand this: Creativity and I are only ones who will be making any decisions along the way. I recognize and respect that you are part of this family, and so I will never exclude you from our activities, but still – your suggestions will never be followed. You’re allowed to have a seat, you’re allowed to have a voice, but you are not allowed to have a vote. You’re not allowed to touch the road maps, you’re not allowed to suggest detours; you’re not allowed to fiddle with the temperature. Dude, you’re not even allowed to touch the radio. But above all else, my dear old familiar friend, you are absolutely forbidden to drive.”
Keep it with you and make it your mantra!