Everytime I watch Martha (Stewart) bake biscuits she always has her trays lined with a silpat. Click here to see the silpat
It's basically a baking sheet liner, made out of silicone and fibreglass. It's super easy to use (just lay it on your baking sheet), fine for high temperatures (up to 250 degrees C), easy to clean (wipe with a damp sponge, NEVER use a brush or scraper) and is good for up to 3000 uses.
I really want one... and I have found an Australian stockist! Australian stockist of Silpat - now I just have to go home and measure my baking sheets.