I think it's good to be focused on only the things and people that are relevant to moving your life forward in the direction you want to move it in but I also think it's good to have regular sources of randomness;
people you never planned on meeting, stuff you never planned on going to, exposure to disciplines and rhetoric and media you never planned on being interested in
I need more of the focus part than the randomness part right now but I think it has a real purpose. so many things, u never know until it's in front of you