Create a permission slip to live a creative life

Get a pen and paper.

Write down the vocation/passion you want to do while living a creative life.
Define yourself through it. For example, if you want to paint, write "I am a painter" on the paper.  It doesn't matter if you think you lack the talent or skills. Let go of your doubts and just focus on who you want to become.

Stand up and say aloud what you've written.
Consider it your permission slip. Claim it and keep saying it aloud until you fully permit yourself to live a creative life.