Slip Trailing - a technique that involves working with ceramic pieces that are in a leather-hard state and slip (liquid clay with a paint-like consistency) is applied with a squeezable bottle or bulb with a variety of nozzles. Can create delicate surface designs that won't run the way glazes will, and adds a 3-dimensional quality. ©PotteryByLisa
Ceramic Arts Daily – Etched in Clay: How to Make Beautiful Relief Surfaces with Shellac Resist
Fabulous illustrated ideas for decorating raw clay, leather hard clay, bone dry clay, bisque fired, and fired. Including this hot-wax-resist example.
A site with tons of techniques! More
Crayons as wax resist. Holy cow, why didn't I think of this already?!?! :D
sgraffito tips http://www.lakesidepottery.com LOTS of great ceramcis tips and tricks here.
Flower on Leather Necklace at James Avery
Anne-Sophie Gilloen "il penchait toujours du coté de l'été"