If you can find a pattern that's already in a circle, that's great. Just cut around it and adhere it overlapping the bottom of the card. Add another partial circle across the top that follows the line of your circle.
Choose a matching image or square of coordinating pattern and attach your sentiment there.
The sentiment is layered on top of a coordinating square of patterned paper and placed in the center of the circle.
For more great layout ideas, come visit my Etsy shop. You'll find handmade Christian cards, journals and lots of other paper crafts and gifts.