Take the flowers out of their wrapping and remove any waterpicks that might be on the ends of the flowers. Fill a vase with the full package of preservative provided with your flowers and lukewarm water. Cut them down to fit your vase and place more linear flowers (ie: snap dragons, birds of paradise) at the back and larger flowers (ie: gerberas, spider mums) at the front. Recut your flowers every few days and change the water daily to ensure freshness.