If you try the technique on Friday, you will be a foul tempered toad quite unfit for human company on Sunday. Be sensible about costs. It takes me two weeks of fasting and a week of exhaustion to summon it. It won't necessarily be obvious at first - it took me a while to get sufficiently effective. I wish I'd had an IR camera on myself on these occasions.
Energy is information, information is in the eye of the beholder.
Pull back the zoom lens on an isolated mapper doing this, and see him or her in the Reciprocal cosmos. On the creative arrow, data structures are becoming simpler in the brain, and structure is zooming away from the conscious being. This is why mappers constantly engage in tactile fiddling.