I always enjoy the monthy Design Boot Camps on the Stars & Stamps blog. I learn from each of them and try to use the suggestions when making cards. It sometimes takes me a while to really create a sample that I feel works with the design principle. The October Boot Camp was on Balance in Design.
I think I have a tendency to make symetrical cards like this:
After I cut the sentiment with the partial die cutting technique to demonstrate the technique to a friend, I was challenged to create a card with such a strong color and still allow the sentiment to be read. The yellow paper was suitable for that, but made the card feel very heavy at the bottom. I decided to punch some hearts from the scraps from the red paper to add a little weight to the top.
I also did a redesign of the card from the previous post by adding a layer of red around the stars. I now realize that card is also symetrical.