Shibori, known in the West as tie-dye, combines several methods of dyeing cloth with a pattern. Arashi, Kumo, and Itajime styles are among them. The first one involves wrapping a cloth diagonally around a pole or, in general, a cylindrical object. Then the cloth is being tightly bound around the pole with a wire and subsequently scrunched. The second technique, Kumo, consists of wrapping sections of cloth around found objects and bounding them with rubber bands. The last method, Itajime, is a shape-resist technique, where the dyed cloth is folded like an accordion and pressed by two flat objects, bound with wire or rubber bands.
Shibori dyeing may sound like a complicated operation, but I am sure that if you release your creativity, it will bring you a lot of fun to go further in exploring its potential. The beauty and endless variety of patterns will be a great reward for all your efforts.
Check out the tutorial on Honestly WTF.