Commercially sold house plants are selected because they thrive well under conditions present indoors. The key to taking good care of your houseplants is to identify them. Unfortunately, there are thousands of varieties of houseplants in the world, which makes identifying a particular species challenging. But once you know what kind of plant you have, you can research the plant's needs and effectively plan a strategy of care that will allow your plant to thrive.
Call your local nursery or the store where you purchased your plant. If the plant was a gift to you, then contact the person who gave you the plant. Plants are typically started from other plants, so contacting the supplier of the plant should help you identify the type of plant you have.
Compare your plant to pictures in a guidebook. Note the shape of the leaves, stems, the overall height and appearance of the plant. If your plant looks similar to a plant in the guidebook, but not exactly the same, you may have a variation of the species.
Consult an expert in the field. One area to start is to take a photo of your plant. You can send this photo to an agent in your local cooperative extension service to see if they know what it is. Other options include local greenhouse growers or online gardening forums.