I recently attended the CKC in Collinsville, IL. I learned a lot and this is one of the coolest thing I found, using clear stamps. It made my jaw drop! Can't believe I didn't think of it before!
Step 1-Stamp your image.
Step 2-Clean/dry the stamp. Remove the stamp from the block and flip it over.
Step 3-Ink up the back side of the stamp, stamp off one time, and then stamp over your initial image.
Wa la! A shadowed image!
I also did it by stamping the shadow image first, then the initial image. How cool is that??? This was the first time I had ever heard of this technique and I wanted to share it with my StampTv friends.