Book excerpt: Has the ace of hearts already fallen? Michael Lutz has developed an ingenious technique for memorizing playing cards quickly and efficiently. Many practical exercises lead the reader step by step to a super memory. And another advantage: if you master this technique, you can also handle long shopping lists or 50-digit numbers with ease. Use it or lose it! We have long understood it as a matter of course for our bodies and musculoskeletal systems that it harms them if we do not challenge them. True to the motto: If you rest, you rust. Nevertheless, hardly anyone thinks about training their mind. However, the question arises: What use are 20,000 volts in our arms if there is no light above?! Mental health is everything - because without it everything is nothing! With this in mind, I wish you much success and numerous AHA experiences with my self-teaching course.