1. Shift from head to heart
To focus on "can" instead of "can't" for your writing, get out of your head and move into your heart. Creativity starts in the heart.
How? Gently tap your fingers on the middle of your chest and focus on your heart center. Relax and breathe deeply. Imagine breathing in positive thoughts for patience and clarity about your endeavor. Breathe out anger, frustration, disappointment, or whatever limitations you perceive. Finally, listen to nature sounds like humpback whales, birds, ocean waves, or whatever puts you in a serene mood.