[franciscassel]

I disagree with the "try everything" part. Startups are resource constrained, and can't afford the time or money to try everything.

(In marketing, the world of "everything" is pretty substantial, and few of the channels can be properly tested cheaply: paid and organic search, paid and organic social (which includes many different platforms), email, old-school (e.g., print, radio, and TV) media buys, ...the list goes on.)

A smart and experienced marketer will know the tools and techniques for deconstructing what channels are the most successful for direct competitors. They'll also be able to figure out the niche channels where the target audience "hangs out" that competitors haven't yet discovered.

tl;dr: Don't try everything. Hire a marketer who will help you skip the guessing game and target the already-proven channels in your market.