Many of the cognitive enhancement drugs serve to increase focus and concentration. But 'letting your mind wander' is very often an important part of the creative process.
What's the greater risk? Letting go of what people think - or letting go of how I feel, what I believe, and who I am?
Life is one big road with lots of signs. So when you riding through the ruts, don't complicate your mind. Flee from hate, mischief and jealousy. Don't bury your thoughts, put your vision to reality. Wake Up and Live!
Not all those who wander are lost.
J. R. R. Tolkien
Your mind is nirvana.