There are way toooo many ways you can save on the wedding day. I'm just listing a few here:
- get marry around special holidays/occassions (Thanksgiving, Christmas, etc) 'coz most venues will be decorated by then and you can spend much less on deco and flowers.
- rent colored linens and chargers as a part of your decorations, that will allow you to cut down major expense on flowers
- brew your own wine
- DIY party favors
- hire a wedding planner (not only they save you time, they'll be able to negotiate sweet deals and great discounts for you.) The amount you'll end up saving is much greater than paying for their service.