I've recently started taking and keeping notes for most every book that I read. I've done this for a few reasons:
This is not an original idea; the inspiration to do this arrived via Derek Sivers and Nat Eliason. I also can't say I have any particular end-goal in mind by publishing them. It just strikes me as a generally good idea, if for no other reason that making it easier to point towards and link to books I've read.

All book notes

Eye opening exploration of ideas and (believe it or not) how they are formed and come to be. Fascinating perspective on how innovation truly works and it busts a lot of myths and misconceptions along the way. Strong recommend.
This is the number one book I wished I had read ten years ago, ideally before I started university. Describes a system for the managing of ones own thoughts and ideas, and does it in plain English. Turned me onto the importance of understanding metalearning/metacognition.
A short, powerful read from one of the world wide web's original entrepreneurs about, quite simply, how to do business. Provides an enormous amount of insight and common sense in a very short volume. Has the most value per page of any book I think I've ever read. I listened to the audiobook version, which the author also recommends.
A resounding rallying cry of a book. Gives a name to the enemy of our creative work, 'The Resistance'. Defines what it is, how we must defeat and how to move past it. Pick it up in the morning and you'll be done by the afternoon.
A really interesting book from one of my favourite authors and marketers. Successfully explains the realities of brand-driven marketing in the 21st century. Repetitive at times, could be shorter but luckily it's not too long either way.
An incredibly interesting insight into Martin's early career, one I was not familiar with until reading this book (I had only known of him from a handful of movies). Interesting insights into the creative process, originality and consistently working at your craft. Enjoyable to read, too - I read it in a single day.