Get up from your desk and wander outside occasionally. To be a good writer one needs to be a good observer, and there isn't a lot to be observed at desk level.
Jane YolenA mist. A great mist. It covered the entire kingdom. And everyone in it - the good people and the not so good, the young people and the not-so-young, and even Briar Rose's mother and father fell asleep. Everyone slept: lords and ladies, teacher and tummlers, dogs and doves, rabbits and rabbitzen and all kinds of citizens. So fast asleep they were, they were not able to wake up for a hundred years.
Jane Yolen