Finding a mentor. Learning the craft from somebody, who started developing with Fortran and served 40 years in the trenches since then, is weight in gold for me.
Going independent. I work on a variety of projects, work a lot less hours and make twice as much.
Choose something to be good at at, and focus on being the best at it.
what would you suggest to a developer that loves to be free to create entire applications? right now I enjoy being a fullstack, meaning I design my database models, my backend layer and my frontend, but I feel that I have a lack of specialization...