One of my favorite techniques is to make "windows" into my card by using negative space of the die-cuts. Here I used a skinny rectangle die for my 5 windows and popped up the white layer with foam tape. I then added the Lawn Fawn thanks across the windows. I debated about what color the thanks should be but then went with white with another black one in the back - slightly offset for a shadow effect.
I really like this sketch - tucking it away for future use!