Elizabeth Craft Peel Off Stickers. That is all.
Seriously though, you want a fun way to easily create some beautiful cards without messy stamping or embossing?
Then these are for you.
You can even alter the silver sentiment sheets to match your project, using colored Sharpie markers!
I've watercolored these cards, but you could easily use anything else, from colored pencils, to Copics, to watercolor pencils.
I posted these cards at Love is in the Details awhile back, and you can find more samples over there.