As they grow taller, often up to an inch, they tend to bend toward sources of light. Place the wrapped bunch upright in a container holding cool water deep enough to submerge the exposed stems. Leave in a cool place for an hour or two. Your tulips will be standing tall. Most bulb flowers like cut flower food in the water.
Tulips are the exception.
They prefer their water straight. Color is tulips strong suit. You can create a wild riot of color or try more subtle single color combos such as purple with lavender, light yellow with deeper yellow. Flamed or multi-colored tulips look great mixed with solid color tulips in coordinated shades. Tulips combine well with other flowers.