One of your many jobs as manager is information conduit, and the rules are deceptively simple: for each piece of information you see, you must correctly determine who on your team needs that piece of information to do their job.
RandsSnark from nerds is a leading indicator that I'm wasting their time and when I find it, I ask questions until I understand the inefficiency so I can change it or explain it.
RandsWatch with awe and amazement at how quickly an engineer will become totally annoyed by inefficiency.
Rands