Getting your idea off the ground
Consumed => “Building a Business: Marketing and Product Development” by Patrick Mawhood on University of Oxford (podcast).
In short, be thorough and think things through. Yes, you can move quickly but that doesn’t mean you should be mindless.
btw, another way to test is with Pay Per Click ads. Set up a (faux) landing page and then see if you can drive traffic into it with PPC.