A basic way of manipulating fabric is by turning a flat fabric into interesting textures through gathering techniques. Here are some tutorials that helped me with my projects.
http://annekata.com/2010/06/summer-flower-tutorial-grow-your-own-hybrid-in-5-minutes/
http://darlinganddash.com/bonnetcardboard.html
http://sewing.about.com/od/embellishment/ss/basicyoyo.htm
http://kindawonderful.typepad.com/pink_paper_peppermints/2008/06/rounded-petal-fabric-flowers-31-crafty-flowers-in-31-days--day-23.html
http://justanotherhangup.blogspot.com/2010/04/gathering-fabric-muslin-pillow-tutorial_20.html
http://www.roserushbrooke.com/how-to-ruche.html
I'll post pictures soon :)