Chartreuse pom-poms brighten up an arrangement of pastel roses and hydrangeas. "Love Song" bouquet, $100, from Teleflora, teleflora.com. Hand-painted butterflies, $10 for 12, from Eliza Fig, elizafig.com, make a welcome addition to everything from your cake to your bouquets. Can't find the perfect guest book? Consider a customized option. Bespoke guest book, $55 for 50 pages, from Enji Beck, enjibeck.com. Blown-glass pens, $24 for four, from Beau Coup, beau-coup.com, let guests sign in style.