Hang the bouquet upside down in a cool, dry, dark place.
After it dries, place it in a box lined with tissue paper.
If you don't have space to store the whole bouquet and know you would never look lovingly at a bunch of dried flowers, select a few blooms to press. Just open a dictionary, fold a paper towel over the blooms on a page, then close the book and leave it flat. The next time you look up a word―voila!―you'll find a flattened-flower keepsake. You may even decide to use a few pressed flowers to adorn your first-anniversary card.