When we got married, we had the wedding and then darted off on our honeymoon, leaving a ton of wilting flowers in our wake. Although I felt a touch sentimental and a little guilty about abandoning them to turn into what would essentially amount to really expensive compost, I wrote it off as one of the (many!) prices you pay for having a wedding in a state you don't live in. I was busy learning how to be a wife, I didn't have time to fret about how to preserve a wedding bouquet! Luckily, my mom wasn't so quick to throw in the towel (er...toss the bouquet?)
After the dust and our credit card bills had settled, my mom surprised me with this beautiful wreath made from flowers dried from my bouquet. It's such a sweet idea and allows you to preserve your wedding bouquet in a way you'll actually be able to enjoy on a daily basis. (Not saying a dried bouquet in a glass box isn't enjoyable, especially if you spend a lot of time hanging out in the back of your closet with your Christmas decorations and taxes from 10 years ago.)
She didn't do anything special to preserve the flowers, just simply hung the bouquet upside down until it was dry and then dismantled it. (Although, if you're interested, there are plenty of more complicated ways to preserve wedding bouquets.) She wove and hot glued the flowers into a basic grapevine wreath. I love how vibrant the colors are, even now that the flowers are dry.
If you're not having a wedding anytime soon, you could turn any bouquet into a sentimental reminder of a special day.