Hi {{first_name}},
It was great to meet you last night at the [[event name]]. I enjoyed our conversation afterward—particularly, [[something specific they talked about that stuck out to you, that you admired, or that inspired you]].
Here is [[something you mentioned in the conversation]] OR When thinking back on our conversation, this [[tool/article/resource]] came to mind that you might find interesting:
[[link to the tool/resource]]
Stay in touch,
[[your name]]