One great source of structural ideas is the alphabet--each letter is after all a mini-structure.
I think the mathematical symbol for pi is gorgeous. Combined with my influence from Sam Maloof in the 1970's, I made the following Gallery Benches around 1978.
These are a labor of love--and are not for those in a furry hurry.


[img]http://www.bridgecitytools.com/blog/wp-content/uploads/2009/07/Blog-Stool-2.jpg
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So the next time you think you are out of ideas, seek forms in any alphabet --symbols too. Don't forget different fonts either.
--John Economaki