"You'll need to offer something different - an 'angle' in order to get noticed. When we started our site more than 5 years ago, we had a lot of content and features that weren't available anywhere else. So we got noticed, and linked to. You'll need to find something that we (and our competitors) aren't doing, if you want to make an impact.
We've got a small experimental site in another niche altogether (non travel) that earns more than 10 times as much per page view as our UK Travel site. As a result, we're currently diversifying into other things - we're finding niches that seem to have better earnings potential, and less competition.
Better to dominate a small area - and then branch out, than to fail to get noticed in a more general area." 7_Driver