Brian Eno on Creative Practice.

[SiD]

Developing Your Creative Practice: Tips from Brian Eno :: Tips :: The 99 Percent

I agree with most of this but it only works if you're either (a) self employed or (b) work for a very enlightened company.
Try telling some pencil pushing civil servant manager that you're off sit on the bog for a half hour in order " to fully disengage and relax in order for a “Eureka!” moment to arise".