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.
The time you invest to make any significant amount of money is the same amount of time it takes to build a course or other offerings. If you want to make good money with ads (in the thousands), then you need to get 100s of thousands or millions of pageviews a month. This takes time and in that time you could just as easily build up your mailing list, create an infoproduct and make thousands whenever you want.
Just make sure that the e-book builds on your blog output—don’t simply rehash what they have already seen! After all, these people are now paying customers and will get upset with old information. Later on, as you become more established and your archived material becomes more extensive, you can poll your readers to learn what topics they’d be interested in learning more about and interested in purchasing.
To all the bloggers out there…STOP sucking up to the very small, elite and narcissistic group of self-proclaimed influencers out there. If you all stop treating them like they’re special, they will not longer by special and therefore some of us who aren’t in there secret society will be seen as knowing what we’re talking about too! This isn’t High School, grow up and read someone else’s blog already!