If you wish to be a writer, write -- Epictetus
Sometimes I forget that to be a writer, I must write. I think about writing all the time. I conjure up things to write about. I make lists of ideas to insert into writings-in-progress. I plan how I'll promote the writing, but the writing time is not always my first priority.
I like this simple quote. It reminds me that writing needs to be at the top of the list always. Productivity will follow.