Boxes and Arrows serves up three great articles right now. George Olsen shares his R&D (Relevant & Desirable article discussing the need for vision driven design in user-centered design. Scott McDaniel offers up What's Your Idea of a Mental Model?. My favorite of this current bunch is Erin Malone's Modeling the Creative Organization in which Erin walks through how to put together her idea of an ideal creative team. Her discussion is provides insight into a great approach.