PS: my answer to this question is always… “the better question is… how can my blog help me build a profitable business?” Most of the profits from blogging are not made on your blog, but that’s okay. I don’t believe blogging about making money per se, but about branding yourself and positioning yourself within your niche market as an authority and leader. Once that is established, there are so many ways to move people into your money making enterprises. Email marketing, as you pointed out, is one of the best ways to do this. Sending people to your membership sites, services, info products and coaching programs are all great things to route people into as well.
John is the host of EOFire, an award-winning business podcast, interviewing top entrepreneurs. He’s interviewed successful entrepreneurs such as Gary Vaynerchuk, Tony Robbins and many more. John is also the author of the #1 ranked book for Podcasting in Amazon. He’s an excellent example of what happens when you chase your dreams and remain committed. Consider a free blogging service. Many people opt to create a free blog using popular services such as WordPress.com or Google Blogger. This is a good option for people who aren't familiar with web design, don't want to pay for their own hosting, or enjoy the ease and stability that comes with these services. These services do have limitations on how you can make money using them, however, so make sure your blog won't break the terms of service.
Of course, offering products and services doesn’t have to be mutually exclusive from using ads. You can do both, but what I see happen is that when you start to make $5 from ads you try to figure out how you can make even more and that becomes your focus. The tactics you use to boost your ad revenues are often the ones that prevent you from building your list and promoting your own products.
Once you setup your account on AdSense you will be given a code to add to your blog. This code will automatically display advertisements on your blog from companies who are part of Google’s advertising network. You may see ads from small companies related to your topic, or you may see ads from large companies that are completely unrelated to your topic.