I discovered Zentangles at BEA a few years ago. Now, Design Originals has put out several books featuring this unique "doodle" technique. Zentangles are hugely interesting to look at and they appear to be easy to create.
Zentangle Basics describes the process of dividing your design space and adding elements; curves, contrasts, lines, swirls, etc. Design Originals also offers books using Zentangles in fabric arts, fashion design and as a de-stresser.
Check out this creative sketching technique. And check out Design Originals. Zentangles are just one of their many clever how-to guides.