Interesting! Could you share the memory course? I often feel like I have similar issues with my thinking, and I find it hard to focus. Willing to explore any avenue that would make it easier for me to focus.
Keep in mind, that this is a very simplified few of the process, and it likely won't work without a detailed lesson plan, and strict following of this guys rules. Also, it's not an easy thing to learn, it took a lot time. But once you do, you can use it pretty quickly.
I got long term general memory improvement out of doing all of these things. But the super amazing feats you learn are like exercising muscles. You don't keep them unless you keep using them.