When writing new articles, I try to avoid too much routine. I write at different times of day with a highly irregular schedule. I don't have set days or times for writing.
Sometimes I'll even head down to the Las Vegas Strip and work on an article while sitting in 4-5 different locations throughout the day. Last month I wrote an article that was partly composed at the Luxor, New York New York, Caesar's Palace, the Venetian, and the MGM. I'd work on it for an hour in one location, then get up and walk to another spot while thinking through the ideas for the next section. It was one of my more memorable writing sessions.
I regard routine as scaffolding. It's good to have a basic structure to each day for practical reasons, but for my core work I like to keep mixing things up, so every day is different in some way.