Although I haven't read the book (yet - sample on Kindle), I have tried to apply principles of unschooling to my own learning process.
Background: I'm 25 with a bachelor's degree in CS and currently leading the platforms & analytics efforts of a tech startup. Stellar academic and co-curricular record till high school.
The degree took 6years (I withdrew two years in the middle) instead of the usual 4, and I think one of the reasons (although not primary) that contributed to that was sheer boredom. I am undoubtedly opinionateed here, and what I speak of is a personal experience, but I just couldn't get the point of what they were quizzing us on. The books were great, the content amazing, the lecturers okay, but sitting in a class of 60 only to be asked in the exam: "List the five things about..."; "How does this work, explain with a diagram"; etc.
Although one can argue this is probably more reflective of the university I attended, I would argue back saying that I've attended 3 of them to get the degree, each time looking for a challenge and failing miserably to deal with the mundane teaching and exams.
The books became my lectures and the authors my gurus of their domain. I found the right peer group to discuss problems and developments in the field but more often than not this was done over a drink or 5. That's how things worked out for _me_, my lecturers from 2 of my alma maters (so to say) now invite me for guest lectures (1.5 years out of a degree).
I didn't do anything special. I just skipped classes to watch videos from MIT OCW (pre-Coursera/Udacity/edX) on anything at all that interested me (while of course retaining an emphasis on the semester subjects) and read the books they recommended.