Sometimes it is useful to have a plan in mind, a framework within which to create. It seems counter intuitive, surely complete freedom is best for creative people, but in most cases creating a narrow path down which to venture leads to great things. A structure can form a focus for the mind and of the final product.
A poem these days need not rhyme, or have a steady beat and this can lead to work that, in its freedom, lacks all the other elements of poetry as well, like metaphor for example. Anyone creating music may well stray from historic forms, but at their peril if they walk away from all formal elements and work in a vacuum. Just so in the visual arts, if one is to wander down interesting trails and away from the historic forms of pictorial representation then one should have a very strong rationale to carry the day. Imagination usually requires a form within which to work and that also facilitates communication of ideas to others.
I am still pursuing photography in monochrome and decided today to also limit my photography to a specific theme - trees - their trunks and the texture of the bark, logs washing back and forth in the waves, a grove of oaks poised like dancers, or the twists and turns of arbutus..... I set up a narrow path, thought about composition and benefited from that limitation.