|Photo from autumn by Raven of Chance Photography|
2) Get the right petticoat or crinoline for your skirt or dress
This concept is easily applied to Goth and its hybrids as well - if you are wearing, say, Cybergoth hair extensions, then the fluffy leg-warmers and chunky boots help balance this out, if you are wearing a big bustle-skirt, a fancy up-do for your hair and plenty of hair-ornaments can help balance that out, etc. The basic idea is that if you wear something voluminous at the top of your body, you need to balance it lower on your body, and vice versa. Chunky boots (from the platform Mary Jane heels I wear with Lolita to big stompy New Rock boots) can really help with this balance.
4) Accessories can radically change an outfit
5) Use small splashes of contrast to add to the coherency of an outfit.