Send the first response within forty-eight hours, from the person who had the conversation, referencing something specific that was discussed. Deliver anything you promised, whether that is a spec sheet, a lead time, an introduction, or a quote, before attempting to sell anything further. Then work a pre-written sequence: a substantive follow-up at day ten, a check-in tied to the buyer’s timeline at day thirty, and a genuine reason to talk again at day ninety, with an owner and a date recorded against every account.