I’ve been lurking in your blog for 3 hours now instead of working — though I still consider this productive. ha! Thank you for these ideas. I’ve read a lot of “how-to-earn-from-your-blog” blogs and this one is definitely up there. I wanted to try the amazon niche sites challenge — would definitely give it a thought and will use your link when I decide to actually do it. I’ll visit some of the links from this post now. ;p
However, not matter what method you choose to make money online, understand that you might be able to make some money fast, but for the sizable returns, you'll need significant sweat equity. However, a year from now, you'll be happy you started today. Remember, time is far more valuable than money. Focus on creating passive income streams that will free up your time so that you can quit the rat race and focus on the things that matter. That's the important thing here.
Some subjects are much better paid than others, so although you may love the idea of writing about travel (badly paid) a better bet would be a niche like finance (much higher rates of pay). Check out the Pro Blogger job board for high paid freelance writing jobs – other places to look might be Textbroker or you can look at the “gigs” section on Craigslist.