A common misconception about websites is that if you have one, people will automatically find it. In truth, you need to put a lot of work into promoting your website on an ongoing basis. One of the most common and well known routes is search engine optimisation.
BeFused is a site focused on teaching people about Drupal web development and includes a premium book which is available for sale on the site. While receiving a steady stream of relevant traffic, an increase would result in more email signups and more book sales and was critical for the commercial viability of the site.
On May 17th, I gave a talk called "From Developer to Author" at DrupalCamp Wroclaw in Poland. I outlined a method to make extra revenue, increase exposure and teach others what you know by writing, self publishing and marketing a book.
If you are a consultant, freelancer/contractor, or full time employee, the old saying "time is money" is something you are always reminded of. You work an hour, you get paid an hour. You work a day, you get paid a day.