Nicholas Bate wrote 100 words on writing and it’s delightful.

Take a sheet of paper. Blank, unlined is good and just write. But what? Well, start your novel. Or what’s worrying you at the moment? Or how about things to appreciate, things you’re excited about this week? Keep it narrative. Don’t stop: if you feel like stopping, put an ‘and’ and get on with it. Keep going and aim to fill at least one page. And you know what? After all the irritation you were feeling at the top of the page, some of that is dissipating and you have re-discovered one of the reasons to write: it’s remarkably healing.