First of all, I love your take-action attitude. That's probably the most important key to success. Unfortunately, you're doing it all wrong (in my opinion).

First of all, I love your take-action attitude. That's probably the most important key to success. Unfortunately, you're doing it all wrong (in my opinion). Your chance of success is very low if you're just going to follow the crowds and do exactly what everyone else is doing. I consider niche adsense sites to be the multi-level marketing equivalent of the internet business world. These sites are a big problem for search engines because they're creating a bunch of spammy, low-quality pages that users have to keep sifting through to find the good stuff. I've found that I can't rely on Google anymore for many of my searches due to these types of sites proliferating. It's only a matter of time before we get better search technology that filters that stuff out (even possibly going back to a more human-filtered/curated search engine). Instead of working on these random niche adsense sites, why don't you work on building a site around a topic you're actually interested in? Build great quality content, build an email list, build applications that help your target audience. Choose a target market that's big and spends a lot of money, and create a niche within that market. It's easier to get a small piece of a large pie than a large piece of a small pie.