Ask HN: What system do you use to track professional relationships?

I've been in a position in a large enterprise for six months that's been different than my previous positions. The new position requires me to talk a lot of different people in my org. Some of them on a recurring basis. I've been wrestling with how best to manage the relationships and how often I should have recurring meetings with them. A colleague suggested that I setup a tiered system with a cap of the number of people in each tier. The tier determines how often I follow up with each person in the tier.

Another complementary idea I had was to establish a hierarchial or mind map visualization of the relationships I have. Based on the person I talk to map what relationships they have such as the reporting chain to the top and the people that report to them. The diagram would also have tags or hints about the topical or organizational areas to give further context.

What do you do to maintain the relationships you have and the context around those relationships?