On-line resources are many and varied. Without knowing what areas of the wedding you'd like to save the most amount of money on, I can only direct you to the search engines for even more ideas and inspiration. My favorite is Open Text which indexes web pages and allows you to look for a specific word or phrase. Now, it's a possibility that you can't or don't want to spend that much time on-line. Run, don't walk, to your nearest library.
Libraries are wonderful resources as well.
You can look for books or magazines related to weddings. If you're planning on doing most of the wedding yourself, you can look for books and magazines dealing with crafts. Besides libraries, you still have plenty of options. Visit your local fabric store and look at their ideas. Check out the craft section in the nearest discount department store and, finally, visit bridal shops in your area for ideas.