I attended a Zentangle© class with my sister in the summer of 2014 and have been hooked ever since. I learned some cool methods of pattern repetition, and I will say that it was worth my time.  To be clear,  I’m not one to follow rules, so don’t expect true to form Zentangle© patterns. Here are some examples of my work:

(click on a design to enlarge and view via slideshow)

Hartstring Tangle Pattern Submission 021315
Vinyl Tangle Pattern Submission 021315