Marketing is what hurts startups. If you have a loyal tribe how hard can it be?
blog.omgponi.es
blog.omgponi.es
That is, another approach to marketing is to build something that is just really good - much better than the alternatives. But this is extraordinarily hard to do, and it's much easier if you're in early, before it's mined out.
That said, whenever it seems that a market is stable and everything that can be invented has been invented, that's the very time that is ripe for something unexpected, perhaps coming out of left-of-field (eg. a disruptive tech).
-make something so useful that a tribal following is inevitable (duckduckgo)
-make a viral app that caters to human vices (hotornot)