1. Ceremony seating can tie in with your wedding theme, so consider hay bales for a country wedding or satinccushions for the floor of that urban loft, says Sasha Souza of San Francisco's Sasha Souza Events.
2. Worried that the littlest flower girl won't make it down the aisle on her own? Have a junior bridesmaid pull her in a classic red Radio Flyer wagon.
3. Have someone who is near and dear to you do a reading—perhaps a special love poem—or sing an aria from a favorite opera.
4. Lollipops in candy colors, clusters of berries, autumn leaves—get bold with your boutonnieres.
5. If you don't like the idea of getting birdseed or rice in your hair, give guests sparklers, pinwheels or mini-flags for the big send-off.
6. Pre-ceremony, don't offer food or booze; keep it low-key with glasses of ginger lemonade, says Peter Callahan of Callahan Catering, with locations in New York City and Philadelphia.
7. Hot summer ceremony? Have your wedding programs printed on paper fans.
8. Beach brides: Bury vases in the sand so it looks as if your flowers are growing there, says Michael George of Michael George Flowers in New York City.
9. Will guests be tossing petals post-ceremony? Hang cones or little galvanized metal buckets filled with these pretty items on the backs of ceremony chairs—they'll double as pew décor.
10. Dress doors and entrances with flower garlands and fabric swags. Souza once used a pair of 200-year-old doors as a backdrop for a beach wedding.
11. Your aisle runner is an opportunity to amaze. For a beach wedding, George sprinkled smooth-edged sea glass along the sand so that the whole aisle twinkled.
12. Use a length of linen fabric in one of your wedding colors for an aisle runner. (Hint: It's easy on the budget!).
13. For romantic atmosphere, project slow-moving images—think flowing water or clouds—onto a sleek fabric chuppah or a wedding arch, suggests George.
14. Use a silver tray carpeted with moss for the ring-bearer's pillow.
15. A tip for ensuring that all eyes really are on you: Go for all-white flowers, such as delicate lily of the valley, in your bouquet.
16. If you prefer fairy-tale flowers, ask your florist to arrange individual petals into the shape of a sumptuous rose of any diameter.
17. "Don't be afraid to be creative with your ceremony music," says Souza, who's arranged "I dos" to everything from a single flamenco guitarist to a full jazz band.
18. Reserve ceremony seating for your most important guests by placing name cards on their chairs. If you want to give these guests extra-special treatment, write a personal note on each card.