I think I'm going to use some layouts from Clean & Simple Stamping. What I love about this blog is that she provides templates (what she calls sketches) for cards, and then all these readers submit their own cards using that template, so you have hundreds of different designs you can use for inspiration. There are over a hundred layouts on her blog right now, so plenty to choose from.
Here are a few examples (the sketch and the result) - all of these images are from Clean & Simple Stamping. I've put links to the posts underneath the pictures, so you can see all the other submissions from readers.