There's a really quick and easy way to add a decorative edge to panels on a card or scrapbook page. Here's a little tutorial on how to do it.
First: You'll need a scoring blade for your paper cutter. Don't worry if you don't have one... a bone folder with a really pointy end will also work fine. The scoring blade works the same way that a cutting blade works (you slide it up and down the track) however it will not cut into your cardstock. You don't need to push really really hard, just hard enough to make the score. If you are using thinner paper (designer series papers) you will want to adjust the amount of pressure that you use.
Second: This looks much better if all of the sides of the panel are scored at the same distance from the edge. So use the ruler (see the blue arrow) and line up each side before you score.
Third: Score it. Now... I don't move the paper from it's spot until I am satisfied with the depth of the score... sometimes I am too light and I have to go over it again.
The finished card is shown below. I love this design - so simple and yet so nicely laid out. You can click on the picture to see the detail a little better. For this card I used the stamp sets "Wishing you cheer" and "short and sweet."