If you are in the process of starting up a business venture, you could do worse than reading this blog post on Techcrunch - and the comments (almost more important). I one comment to this: from what I see, a big chunk of those companies that "make it" start off with a couple of "entrepreneurs-at-heart", that try to solve a problem they have an personal angle on, e.g. day-to-day thing that is bothering them. There are of course those, that sit down and say "we want to be rich", and they then spend time looking for a problem some other people want to find a solution to, but it is not the most common road to success. But no matter what angle entrepreneurs have on the market they are trying to serve, a lot of energy is typically needed, and Just-Eat is exactly a case of that.