Light : Lots of bright light will keep her happy but beware of direct afternoon sun.
Water: Err on the side of under watering. Overwatering will make her very unhappy. Let the top of the soil dry out in between watering, and reduce watering after the blooms are finished as your Poinsettia will need a wee rest after all the Christmas blooming festivities.
Temperature: She’s not going to want to get cold, and won’t love a draft, but if you keep her ambient she’ll be lovely.
Toxicity: This one isn’t a snack, and while it’s not going to cause any serious damage if swallowed it can cause an upset tummy.