No 26! This might actually be one of the most important ones on this list. Eventually every artist will reach a point where this is the hurdle they'll have to jump if they want to take their work further.

Pursuing your goals... requires pursuit. Sitting and waiting for the mood to strike means wasted time you could (and arguably should) be practicing. Making art is a skill, one you should be able to rely on, just like cooking or doing math. The fundamentals always remain in your bag, ready to go.