I actually learned this from a sports trainer, a skydiver specifically, who recommended the book Mental Training for Skydiving and Life. When I used to skydive

I actually learned this from a sports trainer, a skydiver specifically, who recommended the book Mental Training for Skydiving and Life. When I used to skydive I would use techniques outlined in that book to prep myself. It was basically all about envisioning success and driving all other thoughts out of your mind. Athletes do this before an event. It actually goes into more thorough techniques where you "rewind" and "fast-forward" your visions of success. It's the whole "what the mind believes it can achieve" and helps you get into the zone. I agree about the work spaces, it's can be hard to get a moment by yourself, let alone one where you can close your eyes for a few minutes without being disturbed. In those cases I end up putting on my head phones and doing it anyway. I probably look like a weirdo :D