Here's a thank you card I did awhile back. I just love these colors together.
I attached the white focal point with some little sticky pads my brother got from his work. When he first brought them over I wasn't sure they would work. Now I use them all the time. They are great because they give the card dimension but they aren't at thick as the foam dimensions. I'll try to take a picture of them and post it so you can see what I'm talking about.
I went around the edge with my black pen and finished it off with a few black pearls.