I have seen the demos of wrapping your fibers around a piece of cardboard to visualize combinations in stripes. It is here I can see the importance of Proportion most clearly.
Have you worked with designer rules/tips that worked? Broken the rules?
Are you drawn to certain types of stripes?
Are there any basic design rules for proportion, such as there are in color values?========================
♦ Design to Weave With the Fibonacci Numbers - http://www.craftsy.com/blog/2014/08/designs-for-weaving/
♦ Search Pinterest to see samples - key words 'striped fabrics'
I have never done card wraps
I have thought to, but I just haven't done it yet. I can see how it is a great design tool but for some reason I just haven't, probably due to the fact that I tend to be a bit lazy with details.
On the other hand, I have used the Fibonacci series a lot. Almost all of my warp stripes, both symmetrical and asymmetrical are bases on Fibonacci. It works every time I have used it. That is my most "go to " design tool and it just does not disappoint.
Hue value chart for ratio
Weavezine article by Barbara Walker - http://www.weavezine.com/content/woven-ratios.html
Shows a Chart for a numerical intensity value that can help with ratio of colors in any weave pattern.
My first stripe design
I used advice from both methods to design my first stripe. The desired look is a global, matte fabric for a small pouch.
I read you can mix wool and cotton, as long as you keep one type fiber in the warp and the other in the weft. Or, alternate each one in the warp. So I will not add that one cotton thread to my warp just to get the twinkle from one stripe.