I recently came across a YouTube video showing triple time stamping and I thought it looked pretty cool, so I decided to give it a go.
I essentially followed to instructions and measurements given in this video by Dostamping. The video was very clear and easy to follow. I think her card looks better than mine, but I have limited supplies in my stash at the moment.
Basically you temporarily stick your three bits of white cars on top of each other and stamp your design. Then you seperate them, mount each on a piece of coloured card and then pop them back together (making sure not to flip any of them upside down.
Both the stamps below came from the Kaisercraft Christmas Wishes set. The ink colours are Watermelon Wonder and Emerald Envy (the lighter background is created by stamping off once prior to stamping the card).