People picture Salinger as the man who quit. He didn't. He kept a working writer's schedule in Cornish for decades, going off to his studio in the morning and staying at it for hours, long after he stopped letting anyone read the results.

The Direct Answer
He wrote nearly every day, going to his studio in the morning for long, disciplined hours.
Documented in Margaret Salinger's Dream Catcher and Joyce Maynard's At Home in the World.

Early to the Desk

Salinger's day was built around getting to work early. He'd leave the main house in the morning, walk down to his studio, and stay there for long stretches. Joyce Maynard, who lived with him in Cornish in the early 1970s, remembered him writing in a disciplined way for a few hours every morning. His daughter Margaret, recalling later years in her memoir, described far longer days, her father at his desk for the better part of the day, close to every day.

The accounts differ on the exact length, and that makes sense. They cover different stretches of a life that ran from the early 1950s to 2010. What stays constant is the shape of it, an early start in a room built for the purpose, kept up whether or not a book was ever coming out of it.

Even the numbers we have come from the handful of people allowed closest to him, because Salinger gave almost no interviews and let no one watch him work. What they agree on is that the routine outlasted his public career by a wide margin. He was still keeping it in the years before his death in 2010, decades after the last time he let anything reach print.

I love to write and I assure you I write regularly. But I write for myself, for my own pleasure.

J.D. Salinger, 1980 interview with the Baton Rouge Advocate

Discipline Without a Deadline

Most writers work toward publication. Salinger took that out of the equation and kept working anyway. Nobody was waiting on the other end of the pages. He wrote regularly for its own sake, which is a harder thing to sustain than it sounds. Deadlines drag a lot of people to the desk. He showed up without one, year after year.

He also protected the routine fiercely. The studio was off limits during working hours, and the household ran around his need for uninterrupted time. That protection was part of the discipline. The schedule held because he let nothing interrupt it.

For the room where he kept all of this and how he set it apart from the house, see the full J.D. Salinger writing routine.

What You Can Steal