A blog highlights your technical ability and showcases your ability to write blog posts. Your blog can be about different topics than those you write about for your clients. In fact, it should be on a topic that interests you. Visitors will see that you can not only write, but you can also build an online community. A good blog has the potential to earn you many referrals for more clients.
High-ticket consulting or coaching: You could sell your own high-ticket consulting or coaching products from your website. You'll still need a website, merchant account, sales funnel, lead magnet and many other items. But you can easily earn a substantial amount of money from each individual customer, making it well worth the arduous setup required.
It is also better to view ClickBank as a tool for generating leads, instead of hoping to sell 100,000 copies of your e-book immediately. Use ClickBank to drive visitors to your website, then get them on a newsletter list and market to them repeatedly. You may want to offer a contest or freebie along with the newsletter to encourage people to sign up with you.