To maximise the life of your flowers, aim to replenish the water every 2-3 days. Remove any dead or wilted flowers as they will effect their neighbours.
Whenever your blooms are detached from water, snip the stems at a 45-degree slant. This optimises fluid intake and can extend your flowers' lifespan.
Flowers are partial to cooler climes. Shield them from hotspots like heaters or sun-drenched windowsills to retain their freshness.