Think you’re good at networking? Properly following up

I wish the article went into detail of following up with VCs. For example, how to followup after the first meeting? I've felt that a simple "Thank you, I look forward to talking more" isn't good enough. I think you need to go further and answer any large questions that cropped up in the meeting.

I log notes about people that I meet along the way, usually on the back of their card. Then I try to input this data in my contact manager and set a reminder in the future to follow up.

This simple process also helps me to measure my progress (internally) by comparing follow up notes with my actual projected growth.

Fwiw, I also digitally convert bcards, follow conversations online and keep a list of people on a 'watchlist' and plan my events around meeting these people at some point.

How does one manage all of this? For example, I've successfully followed up and want to re-contact with them in a month with something topical. How do I manage to remember this (when the contact list get's large) and how do I manage what's topical to each individual contact?