I did read the archive of newsletters on the website and looked at the extensive gallery of examples. With that and the magazine article I mentioned, I learned some of the basic patterns and format used in making these intricate designs. I got out my Micron Pens (had 'em already) and some heavy illustration stock (had that too) and started to play. Within a short time I had created my first Zentangle. Then another, and another, and boy am I hooked! It's like doodling on steroids.
There is indeed a meditative (zen) effect in making these repeated patterns within the form (tangle). It is an exercise in focus and is very calming. So, if you haven't heard of this before, you might want to check it out. I think you'll enjoy it.