First, always start with a clean vase and fresh, lukewarm water. Trimming the stems at an angle every few days allows them to absorb water more efficiently, while removing any leaves that would be below the waterline prevents bacterial growth. You should change the water every few days, or sooner if it gets cloudy. Finally, try to keep your bouquet in a cool spot away from direct sunlight, drafts, and ripening fruit, which can shorten the flowers' life. Following these simple steps will ensure your bouquet stays fresh and vibrant for days to come.