Very good summary of what artists must do. Another key element is that artists must continue to make art. They must always be thinking and considering different ways to fine tune and refine their artistic talents. They must continually seek feedback, check on currency and relevancy of their artistic creations, make adjustments, consider new points of view or ways of looking at art in general or different ways for looking at their artwork, etc. Read art magazines, go to art galleries, meet with other artists, and talk about art, culture, and society. Experiment in various artistic styles.
They should read and review other artists for the sake or appreciation, critique, new understandings of where art is headed, and unique ways for art to be a form of expression, whether that is an expression of feeling, content, message, form, style, society, artistry, the artist, beauty, etc.
For example, an artist's self portrait is never really just about the artist. It's often a critique of the concept of self presentation, or a commentary on the construction of identity by self vs. society.