Arrowheads (also known as syngonium, or nephthytis) like to be kept moist, so plan on watering your plant about once a week. Think lots of little sips, instead of one big drink every few weeks. These plants would also really dig an occasional spritz of water between waterings.
These plants like lots of bright indirect light (think 2-3 feet from a sunny window.) Too much direct sun can cause burns on the leaves so if you notice any leaf browning in the center of your plant's leaves, move it a little farther from the light.
The leaf shape most of us are familiar with is actually the juvenile form of this plant! Once it fully matures the leaves will change shape and the plant will vine up a support, like a moss pole or a trellis. If you like the juvenile form (the arrowhead shaped leaves) just keep your plant trimmed.
Arrowheads are poisonous, but usually not lethal. The sap can cause skin irritation or burns in the mouth if eaten, so be sure to use caution if you live with small humans or furry friends!