Whether looking for something to enhance text or a photo in your project, borders and backgrounds can lay the foundation. From scrapbooking to websites to creating invitations and cards, these types of illustrations can take a a design from simple to complete.
Though I work in an image-related industry, most of my creative use of said images is exercised in sporadic attempts at personal projects. I've made some invitations for showers and parties, greeting cards for friends and friends and cutesy t-shirts for kids and grandkids. And in most of these cases I've found the the right border will pull the project together. In some cases it's actually almost all you need.
To get you on your way, I've gathered a few into this collection from iCLIPART.com. It's just a small sampling. If none of these are what you're looking for there are literally hundreds of others on the site.
iCLIPART.com Borders and Backgrounds