Pretty flowers!
You know, something as simple as choosing carnations over roses, or artificial flowers over fresh, can save a significant amount. I love carnations, and had them in my wedding bouquet and hairpiece, while my maid of honor and bridesmaid (just the two - my best friend from high school and my cousin) had artificial flowers. The whole flower cost was about $100.
$50 for the organist (an Air Force wife), and $50 for the “coordinator,” another wife, whose job was to unlock the chapel, turn the lights on, and tidy up afterward. Years later, people were still saying, “I loved your wedding!”