Long stem hybrid teas like French Perfume, Mister Lincoln or Perfect Moment make beautiful cut arrangements, as do antique roses. Cut flowers are the reward of working the soil, so you want to get the most of those flowers in the vase. Conditioning these flowers before placing in the vase can lengthen their life. Most flowers like to be conditioned in 100 to 110 degree water. The warm water is taken quickly into the stems.
Hot water works for tree and shrub cuttings, and cool water for ferns and spring-flowering bulbs.
Experiment some with your flowers. Some flowers wilt very easily, but there is a little trick that will surprise you with how well it works. A large pickle jar covered by cardboard with holes also works. Place the flowers through the holes, resting the petals on the board. The petals flatten out and the stems regain their stiffness.