There will always be an image attached to your persona. Work toward it. Think about how you would like to be known in your organization, among your peers and your team members. For instance, you could choose to tend toward being an assertive leader or display a higher affinity toward being an empathetic one.
Your way of working and behavior are the most prominent contributors to your personal brand. Softer aspects like the way you dress, your digital presence and informal communication with others also help in creating and strengthening your personal brand.
Consider these action points as small steps toward your ultimate big goal. It is easy to slip into the inertia of your routine work and put your larger goals on the back burner. However, being aware of the same helps you put in conscious effort toward improvement. So, keep at it!