I would encourage you to think outside of design development. Look into developing your business sense. Pick up “Design for Business” or copies of Harvard Business review. Get a subscription to Fast Company, Fortune, and other business magazines.
I would also suggest developing your facilitation and influencing skills. Learning guide and influence people is a large part of what makes a solid designer and design manager.
Developing you design sense will come just by doing your job. This is your comfort zone. You need to develop outside your comfort zone. These are the developments that further your career.
J