I remember the first time I felt old as a manager — more than 10 years ago now. It was at a lunch with my new team when I mentioned the first “45” I bought with my own money as a kid. One of my direct reports, who was 10 years younger than me, looked at me blank-faced and asked, “What is a 45?” She had never seen the single-song vinyl record format. We came from different worlds. On the same team, I had another direct report who was 30 years older than me. She was quick to answer my question about her first 45, but I had never heard of the song or the artist. Over the next couple of years I had what I perceived as serious “generational issues” on my team. I learned a few lessons about managing across the generational divide.