Do you ever doubt yourself?

Do you ever doubt yourself when writing or doing something creative/dear to your heart? (AKA, are you human?) Well the brilliant Caroline Leavitt just posted this technique over on her page: A brilliant friend of mine told me to name that stupid, ugly voice inside of me that says you can't, you're stupid, you have no talent, because once you name it, you can dismiss it and take away its power.

I am calling that voice the Laughing Face, and I am slamming the door on it NOW.