After you have identified a market and start getting some prospects (determined by page views for SEO and list size for social marketing), it is time to start making some money. This is the easy part because most likely, if you are interested in your niche, there are several things you have purchased that have helped you out a lot.
For self-help and Internet Marketing, I cannot recommend the 4 Hour Workweek highly enough. When I read the book, I was ready for it, and it just makes things click in terms of how to remove yourself from the 9-5 grind, still get paid, and be more effective with your time. I love this book, and would recommend it to everyone whether or not I were an affiliate. Luckily, if you click the link above and buy from Amazon, I get a small commission.
Think about what you really like in your niche, find affiliate programs, and promote them just like you would tell your friend about the product. I have also been raving about my five finger shoes for a couple years now, and there was no affiliate program, but just yesterday I found that they sell them through Amazon. BOOM, affiliate link.
Perhaps you cannot find any affiliate products or programs in your niche. Don't worry if this is the case because there are tons of resources available for finding products to promote, and I will cover these in my newsletter.