Is this an upward move more responsibility? So how do you break down getting a promotion into action steps?
Can you provide a presentation or training at a team meeting? Learning from those whose success you want to emulate can make you better at what you do. Ask for an outside perspective from supervisors or friends when looking at which of your skills need the most development.
Talk to your supervisor. Asking yourself what goals you wish to achieve and why will help you know where you need to start. Interview or start the promotion discussion.
Determine new skills or experience you will need for the new role. Personal development means growing different areas that will help you to be your best self. Make deadlines you can meet and stick to them.