Help, help! I know nothing about formal design theory! What do balance, unity, line, color, movement, and contrast have to do with making jewelry? Don’t despair. If you don’t have time or funds for a college-level course on design, check out some of the best the web has to offer:
Formal Visual Analysis
A good introductory article by Jeremy Glatstein on the elements and principals of composition.
Art, Design, and Visual Thinking
An entire online design course by Charlotte Jirousek.
50 Ways to Become a Better Designer
Tips supplied by various artists.
The Color Wheel and Itten’s Color Theory