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This a thousand times over.

Never sell yourself the first time you're meeting someone. Explain what you do and turn the conversation back the person you're talking to. People love hearing their own voice, so let them talk. Take a genuine interest in what they do and they'll remember you as a good person.

If you can help them, reach out the next day with the whole "I was thinking about X. We do Y, perhaps we could help." If you can connect them to someone who can solve their problem that isn't you, do that as well.

As the parent says, people remember and refer / think of you first when you're needed.