A bit back Mike McDerment, the founder of FreshBooks, and Donald Cowper, published a free eBook called Breaking the Time Barrier — How to Unlock Your True Earning Potential.
The tagline is “Learn how to charge what you’re really worth. Read this book and find out how you can earn twice as much as you do today.”
It’s an excellent guide, and it’s free (well, you can donate if you like, but not until AFTER you’ve read it).
Many of the approaches discussed are similar to the work of Alan Weiss, of Summit Consulting, namely the proposal structure and value-based fees (which is not a bad thing; I’ve learned a lot from Alan’s body of work in this area), while being a bit more accessible to the typical freelancer (if nothing else simply because many are already familiar with FreshBooks).
It is a fairly quick and easy read eBook and anyone doing freelancing, consulting, or quasi-consulting service-based businesses will get something out of it.
Breaking the Time Barrier — How to Unlock Your True Earning Potential. (Cost: Free, ironically.)