They prefer 65°F to 70°F during the day. Keep them away from cold drafts, radiators, and heating vents.
Look at the true flowers—the small yellow clusters in the center of the bracts. If they are tight buds, the plant is fresh. If they are shedding pollen, the plant is past its peak.
It is a common myth that poinsettias are deadly. While highly toxic, they should still be handled with care:
Keep them out of reach of cats and dogs to avoid mild vomiting or drooling. Do you have a bright window (South or West facing)?
Are you interested in a for next Christmas?