I use incontinence pads for the first couple of days. Then I throw shavings on top of the pads. I like the pads because they have a waterproof side and an absorbant side. I put the absorbant side facing up so it soaks up all the wet stuff. They are like puppy pee pads but cheaper if you buy them at a medical supply store.
For shavings I use shredded paper from the diamond cut shredder at work. So far I haven't had one chick try to eat the stuff so it seems to work pretty good. And I don't mind throwing out the whole boxful when I clean every 2-3 days since it's all free and goes in the compost pile. With wood shavings I used to try to "scoop" the bedding like kitty litter to conserve on the amount of shavings I used.