I've never really given much advice on how to be a screenwriter. I've never really felt qualified.
But I do now have a very useful tip for anyone reading this who is, or who wants to be, a professional writer. Or an amateur. Or, actually, anyone who might not want to be a writer at all. In fact, everyone.
And my tip is...
... read Phill Barron's blog post on The Road to Happiness.
He has wise words to say. Which is more than I ever manage.