Study everything there is to know about your company and its competitors. Know the company goals and unique selling points of your company like the back of your hand. Become an expert in these things and be able to talk about them.
Get to know people in other divisions, other offices, and on other teams. Be curious about their department. Learn everything you can about their job and their skills. Find out how they got those skills and see how you might be able to chip in over there in
your spare time to develop those skills you want to use to grow your career.
Amazing mentors will be the people who tell you what you need to hear and not what you want to hear. They will give you the real feedback you need to fill in your blind spots that put you in a position to advance. Mentors are important to advancing your career. They can expose you to new experiences and points of view.
When a new project comes up and it aligns with the skills you're looking to obtain, raise that hand. Let your manager or HR team know that you want to learn some new skills or gain new, more advanced experience. Be clear on what you can offer to the project and get involved.
Many companies have some sort of internal learning system. Go talk to your benefits team. Find out about training opportunities available to you. Learn about any tuition reimbursement benefits you may have. Talk with your HR team about what you want to learn and how it can help the company.