A quick case-study of how NOT to do it:
basically what the product creator in that case-study does is build out an entire marketing funnel WITHOUT first proving to himself that his assumptions are correct.
(something I referred to in the last blog post on launching products)
Leading in almost all cases to a massive waste of time & energy.
So, keep reminding yourself: build those marketing campaigns from the ground up.
Only once you've PROVEN to yourself that your assumptions are correct at stage 1, THEN (and only then) do you move to stage 2.