They say we're good with money!

Weddings cost a ridiculous amount of money. If you don't know this, you may not be ready to get married. Things cost money that you don't even think about - with the thousands going to halls, caterers, the band, photographers, and florists, who thinks about the thousands going to bridesmaid fabric, invitations, postage, and accessories?
Saving money is, unquestionably, awesome. However, there are definitely right and wrong ways to do it. Figure out what your top priorities are and aren't, and allot your budget accordingly. Just remember that some things are never OK as far as budget-cutting goes. Par example:

Good plan: Sending reply postcards instead of cards/envelopes (saves on postage).
Bad plan: Sending reply envelopes without stamps - envelopes must be S.A.S.E.s

Good plan: Keeping flower arrangements simple and staying away from the more expensive flowers like orchids.
Bad plan: Two words - fake flowers.

Good plan: Keeping your guest list at the essentials ("no-ringy, no-bringy" is a popular option).
Bad plan: Cutting essentials, like immediate family members or fiance(e)s of friends.

Good plan: Skipping programs or yarmulkes
Bad plan: Skipping benchers (although the foldy laminated kind's gotta be cheaper, and they were good enough for my bat-mitzvah!)

And 10 more tips...
1. Consider having only one videographer - is four hours of dancing that interesting that you want to watch it twice?
2. If dress isn't your top priority, try going cheaper first. Some options? RK Bridal in the garment district (be sure to ask which dresses can be built up) and David's Bridal (dresses are incredibly cheap but you may need to buy two in order to have the fabric to build it up - buy one size smaller than your dress size in case you lose weight, as every bride but me seems to do!)
3. City hotels are outrageously expensive - like $600 minimum a night expensive. Save money on the wedding night by finding someplace lovely in the suburbs.
4. Giving bridesmaids fabric can be expensive, depending on the fabric and the number of maids. If you're not too picky, you can pick a color and ask all your bridesmaids to find dresses in it. (Give a swatch of the shade you'd like them to match for optimal results. And don't give something impossible, like "turquoise." If you're not OK with "pink" or "blue," there's a good chance your bridesmaids are going to have buy fabric AND pay for a dress, which is too much to ask unless you're planning on reimbursing them somewhat.) You can also choose a dress and ask them all to buy it, but it should not exceed $300 including alterations, and it's difficult enough to find a dress with sleeves that this is a tough option if they're a necessity.) It's also totally acceptable to have groomsmen pay for their own vest/tie/whatever rental. It's under 20 bucks each at Men's Wearhouse.
5. BORROW. Turns out, people are thrilled to lend tiaras, veils, and sometimes even dresses. Cheaper tiaras can still run about a hundred bucks, veils two hundred, and dresses are insane, so whatever you can borrow can be a huge help. Just make sure to try it all together before the big day.
6. E-vites are your friend. OK, they're still a little questionable for weddings, but for engagement parties, showers, and bachelor(ette) parties, they're wonderful - saves on invitations and postage!
7. It seems everything is cheap and wonderful in Brooklyn, but you've gotta ask someone who knows better. I just couldn't do it.
8. Got an artistic friend you might be able to squeeze a free monogram out of? Do you not see where I'm going with this?
9. If you're a morning person (which I'm totally not), consider a daytime wedding. Often places will charge you less because it means they can squeeze in a second wedding that evening. And, as you will quickly learn, a weekday wedding is the easiest way to save money - there is a tremendous cost difference between weekday and Sunday weddings. Just make sure you're not going to be missing half your wedding thanks to rush hour. No-work days (or no work tomorrow days) are the best options in my opinion, e.g. New Year's, Memorial Day, erev Thanksgiving (but NOT Thanksgiving day. Sorry but I think it's terrible when people plan weddings on family holidays, especially Thanksgiving.) Also, I know Tuesdays are the most popular because of the whole "Ki Tov" thing, but I just like Thursdays better, especially in the summer when Fridays at work tend to be casual.
10. Chicken instead of beef. Wine instead of liquor. No sushi instead of yes sushi. It all helps!