I’ve read a number of books by writers about writing, and two things have stuck with me over the years. Ian Fleming attested to writing five pages every day before noon so that he could spend the rest of the day swimming and drinking. (I substitute swimming with hiking.)
And Ernest Hemingway was clear in his autobiography, A Moveable Feast, to not drain the brain so that he always had something to start with the next day. In other words, if you go too far one day, you might not get anywhere after that.