Thinking back over your career: What’s a relatively small change you made that had a noticeably positive impact on your work?

Learning to let go of tasks that others could do freed up time for me to focus on strategic initiatives and allowed team members to grow in their roles.

Never walk away from an opportunity to learn, especially in areas and disciplines adjacent to your function and the contours of whatever industry in which you happen to be at each point in your career.  As Hugh of St Victor wrote, "Learn everything:  one day you will find that none of it has been supefluous." 

Learn early how to prioritize things and how to manage your time.  The Eisenhower matrix, kanban, time-boxing:  find what tools and techniques work for you, but be disciplined in your use of time and ruthless in prioritizing what brings most value to the enterprise.

Focusing on small incremental improvements day to day that are guided by a long term vision. Younger me wanted to boil the ocean every chance I got. I've learned reflecting on successful projects, that a common thread is tackling those projects in a bite sized pieces. That shift in mindset has really helped me improve the processes used in my team's work and the output of our work.

Switching to long term strategic goal setting rather than short term targets

Do few things but do them right and communicate the value achievement