The first step of this meditation is to relax your entire body, body part by body part. Start with the top of your head and relax this area, then focus on your forehead and relax this section, from the front of your head to the back and the middle, too, if you can. Then move down to your eyes, relax everything here, then your nose, below your nose, and your lips. Step by step focus on each area and relax all of the muscles you can.
You claim that "positive thoughts always resulting in positive things" is not the basis of the LOA. In part you are correct. The foundational basis in science, as I alluded to in the article was that thought stuff particles travel through ether (not air) and interact with formless stuff to create whatever it is that you are thinking about. This was how "the law" started.

How To Manifest What I Desire