What does Butt in Chair mean?

What does Butt in chair mean? A bit of writing advice you’ll see a lot is, “Butt in chair!” But what the heck does that mean? I can do a heck of a lot of things with my butt in a chair that have nothing whatsoever to do with writing! I also do a fair amount of writing without my butt in any kind of chair at all between dictation and my standing desk. The following is an adapted excerpt from Building a Writing Life: start a writing habit, find time to write, discover your process and commit to...