have you ever gotten into a routine that required a specific environment/ambience when working on a project?  have you ever tried to only work under certain conditions?  what were the results?  is it best to always change up the environment?  are there any more well-known books that resulted from such an experiment?  i just feel interested in this because sometimes i get into a project and it requires the repetition of almost the exact same room, food, time, cat-petting, and music.  but then, at a certain point, i change it all so i can test the moods in the project.