This is a very utilitarian approach, I don't recommend it if you really want a productive and satisfying life. It took me decades to realize what I'm actually g

This is a very utilitarian approach, I don't recommend it if you really want a productive and satisfying life. It took me decades to realize what I'm actually good at and what not and my values changed often, so a life devoted to one cause that seemed important at the age of 20 wouldn't do 20 years later. I would have been a very bad monk... My projects evolved primarily based on personal interest and needs and they eventually scaled to between a few 100 and a few million users. All gave me some amount of satisfaction, but none of them was my ultimate "life project" or the fulfilment of all desires. Learn many skills and tricks, try a lot of different things (not only job-wise), invest more energy in what interests and motivates you most and don't be afraid to move on. It's better to regret something you have done than something you haven't done! ;-)