If you've ever operated a chain-saw you'll understand the 7th of Stephen Covey's Habits of Highly Effective People - Sharpen the Saw.
You can keep bashing away at a log with a blunt chain but it's a lot more effective - and less painful - to take the time out, get the file & guide and sharpen her up.
I've needed to do that for a couple of days just to get the mind right for a big task ahead.
Music's always been good to me. I marvel at Bach's genius - here's his Toccata and Fugue in D Minor, written 400 years ago and played here by some kids with the world at their feet.