My best business planning is done in a plane.
I always book a window seat and as the plane takes off I love to look down at all the little people and cars.
Once in the clouds, I then break our my 'forcast' spreadsheet and start planning / forcasting.
Somehow stepping away from your work environment allows you to get clarity on what's important.
I wrote my business plan for my current business on an 8 hour flight. I still refer to it regularly to make sure I'm on track.