Just place the leaf where you'd like it and stab a few toothpicks against it to prevent it from rolling or moving. Once the new plant is nicely rooted, just throw the toothpicks in the compost pile.
Oh, and the plant in the pictures are Graptopetalum paraguayense (Ghost Plant) which I purchased recently. I need to find the perfect pot for the mother plant because they're terrible to transfer to a different one without creating a hundred more plants and making the original look quite bare. I think I'll put it in a black bonsai pot so that the plant looks even more pale. Perhaps a white stone mulch? Thoughts?
Happy Cactus Monday!
For more Cactus Monday posts, please visit Teri's Painted Daisies.