How do I turn a launch into an ongoing drip instead of one spike that flatlines two days later?

The spike-then-flatline pattern happens because you spent all your material in one day and then went silent, so plan a launch as a two-week campaign, not a single post. Break the story into a sequence: teaser, the launch itself, an early customer result, a lessons-learned post, a follow-up feature, each on its own day across your channels. Building in public turns your ongoing work into a steady stream of small launches, which compounds far better than one big bang.