Here are some perspectives David Morley shares in his fantastic book The Cambridge Introduction to Creative Writing. 

Writing proceeds forwards slowly, like a sand dune moving through night and day, simultaneously accreting and eroding. Much is lost or invisible, millions of grains of sand, millions of grains of language

You have now begun to walk in the open space of the page. The journey becomes an elaborate series of gambles, and there is no sense of forward progression as such; there is shaping and reconfiguring, stepping back, inking in and beginning over.

A notebook is a movable workplace… A notebook will make the difference between a book being born and one that never achieves conception.

…we have to use the right words and the right words in the best order.

Most writers agree that the best way to write well creatively is to write for yourself.

It follows that the best way to read as a writer is to read for yourself.