Think and Grow Rich by Napoleon Hill. On the face of it, a new age book about turning your thoughts into reality. (And a pretty good one, as far as that goes...)
The author interviewed hundreds of the most successful people of his day and distilled their success principles.
It's packed to the brim with practical advice about how to run a business, and how to achieve any goal. Worth a read.
TLDR pick a goal you really care about, develop absolute faith that you will attain it (i.e. practice seeing it as already done, until it feels real), lay out a concrete plan of action for its attainment, and get to work!
(The section on quality and quantity of service rendered is of particular interest.)
