I read a Quora question recently. It was first published a year or so ago, then updated recently.

The question was what every aspiring writer should know and I liked the best answer. The one up-voted to the top of the answers:

Here is the link:    If you don’t feel like following the link, I’ll paraphrase:

Put the seat of your pants in the seat of a chair for eight hours a day, five days a week. Do this in a quiet place where you can concentrate on writing and only writing. Because being a writer is a job and, just like any other job, requires a commitment of time and energy and the ability to focus on what you are doing.

When you are a professional writer and no longer an aspiring one, then you can write  however you wish, whenever you wish, in whatever way you wish. Until then, follow the rules.