Experienced Higher Education Supervisors - Supervision Foundations

Hi friends - I'm working on a piece on the topic of supervision in higher ed. More specifically, I'm interested in articulating a set of basic recommendations for someone who is brand new to a role that includes supervision. In other words, I'm not looking for what the supervision jedis out there do, but rather what might be a good foundation. Do you recommend any professional development resources? How does one improve as a supervisor over time? If you're someone who has a lot of experience in supervision, thought a great deal about supervision, maybe presented or written on the topic, please let me know if you'd be up for a quick chat.