First, thoroughly clean your favourite vase and fill with room temperature water (fill the vase to 2/3rds full).
Remove your beautiful bouquet from the packaging, keep your bouquet tied or re-arrange to fit your vase. Remove any leaves which may sit under the waterline & trim a few centimeters of the end of the stems, on a 45 degree angle. Place the flowers into the vase and let them sit pretty out of direct sun.
For an extended vase life be sure to, change your water every 1-2 days.