Sitting on my writing desk usually does it for me. It's a desk near the window, wooden, with a few good pens and stationeries... A good lamp for night writing. I find that it conditions me to "get into the peak zone" fast.

Of course, sleeping after researching all the benefits seems to clear away the cobwebs and give you loads of possibilities to start writing.

I've been experimenting with some pseudoscience binaurals and isochronic tones though - they seem to really give a near instant effect of slipping into concentration from an aloof state.

But yeah, I normally go on with functional benefit bullets, and a rough outline... And then bloat it up draft by draft. Often many drafts end up in the bin though...

Regards,
Winston Thaler