By continually trying more difficult things. Of course, you may find that as you try more and more difficult things, your skills continue to grow. So your level

By continually trying more difficult things. Of course, you may find that as you try more and more difficult things, your skills continue to grow. So your level can keep getting higher and higher. Also, note that some people reach higher levels in specific areas. One person might be amazing at low-level, highly optimized C++ or assembly, while another person might be amazing at building deep learning systems, while a third person might be great at designing hugely scalable and robust distributed web applications. Be curious, try learning a lot of things, find out what interests you, and what you're good at, and see how far you can go down the various rabbit holes.