A few years ago, I started collecting mental tools for a good life. I wanted to gain access to the plethora of half-forgotten thought models of classical antiquity as well as the recent ideas that have emerged from psychological research. If we want, we can describe this book as "classical philosophy of life for the 21st century." So, I use these tools daily to overcome the small and large challenges of my life. And given that my life has improved in almost every aspect (I have less hair today and more wrinkles on my face, but they haven't affected me negatively), I recommend them to you with a clear conscience: 52 thinking tools that cannot guarantee you a good life, but can increase the chances of living it.