No matter what your career path looks like, it is critically important that you are continually learning and finding ways to be better at your job. I happen to work in IT, where finding training and education is relatively straightforward. Even the most obscure IT specialties have opportunities to learn more and new skills. Not every career is this simple, but everyone has opportunities to learn more and excel. This might be as simple as reading a book on leadership or finding a course that applies to your career. Go back to school and get an additional degree or certificate. Join a professional group associated with your job. Professional conferences are excellent opportunities to learn something new and improve your expertise.
The idea here is that you never stop learning. If you are consistently learning new skills, expanding, and improving yourself, you will become immeasurably more valuable as an employee. In the end, this is what you want. You want your employer to see that you will continue to improve and continue to provide value to them if they stick with you. The time you spend improving yourself will be paid back with promotions, better pay, and more respect. But, like everything else, the onus is on you to make this happen. Do not expect your employer to find training or education for you; it will not happen. Go out and get after it. Learn something new today, and then communicate what you have learned.
Never stop learning new things to build your career.