In my grad course lab today: Untangling wires. They're a lot of hard work, but are necessary to keep things organized when later using them.
This is probably my first grad course where it involves some hands on lab work. In this case, creating and setting up a networking lab that UOP uses for related lab courses. (This includes setting up the lab policy.) I finally learned that networking is much more than just simply connecting stuff with switches, routers, and networking cables.
Learned: Even though large switches still use jacks, on the back, you have to disassemble the Ethernet cable on one (or both) ends and manually connect the twisted wire pairs - Things like this were not done in the Computer Networking class. I have previously seen these in data centers, but have not worked with them.