Sublime
An inspiration engine for ideas
The Elements of User Experience: User-Centered Design for the Web (New Riders Press, 2002), an excellent book by Jesse James Garrett.
Ziv Yaar • User is Always Right, The: A Practical Guide to Creating and Using Personas for the Web
Web site: www.jjg.net/ia/visvocab/.
Jesse James Garrett • The Elements of User Experience: User-Centered Design for the Web and Beyond (2nd Edition) (Voices That Matter)
The system I created to diagram site structures is called the Visual Vocabulary. Since I first posted it to the Web in 2000,
Jesse James Garrett • The Elements of User Experience: User-Centered Design for the Web and Beyond (2nd Edition) (Voices That Matter)

Breaking Projects into Primary Elements
Scott Belsky • Making Ideas Happen: Overcoming the Obstacles Between Vision and Reality
I used this system to design self-documenting components that were easy to develop against, and allowed the rest of the team to build new and consistent UI without needing me.
Pirijan Ketheswaran • Redesigning an App, One Day a Week at a Time
This is end-user programming, a vision for empowered computing pursued by bright-eyed computer science visionaries.