I've been practising some watercolor techniques lately, and when I graduated from washes to layering and glazing, I was disappointed with my results. Then I realized that it was the drawing and not the painting that was suspect, so I thought "Well, you can draw faces now, so why not paint one?" Of course my Inner Critic immediately responded with "Oh no, you can't possibly paint a face. You're just not good enough." I shooed him away: "It's only paper, stupid. Nothing ventured, nothing gained!"