1. One of my first mentors had a huge lab (like, over 40 people). He made *everybody* learn each others' names. We had to submit our names and photos for online flashcards. There was a lab meeting where we literally spent most of the time going around and naming everybody in the room.
"If you continue in science, there's a good chance you'll interact with one of these people again. And when you do, you'll want them to know your name."
3. Current advisor has a dedicated yearly meeting with each of his advisees, where he addresses each of our long-term professional goals, and helps us set an agenda to reach those goals (even if his advice ends up being "reach out to my friend ____, who's working in the industry that you're interested in and can probably tell you more about what it's like and how to get there")