How do you automate metrics collection?

Hey all, I'm helping a friend improve the events he and his team run. It's networking centric, his main issues are tracking new connections made, any introductions, referrals made and so on. They are tracking all of these manually, and would really like to automate the process. I'm looking to help him out and try to automate some of this. Curious what you all use to automate actions and feedback from your attendees so that events improve over time?