The content of this post can be summed up in two lines from the song Wheel in the Sky, written and recorded by Journey in 1978, which I hope is now as firmly stuck in your head as it is in mine:
“The wheel in the sky keeps on turnin’ / I don’t know where I’ll be tomorrow”
Well, okay, I mostly know where I’ll be tomorrow (at the office) but there are a few hours between work and going to sleep tomorrow night that I’m going to play by ear.

Image credit www.moonbeammcqueen.wordpress.com
So now onward to our …