Temperature: Average room temperatures of 65°F (16°C) --- 85°F (24°C) are suitable and no lower than 55°F (12.7°C).
This plant grows at it's best with bright light, without direct sunlight.
The soil is best kept moist, so water once the soil begins to dry slightly at the top. Over-watering or watering at the crown of the plant can cause the plant to rot. During the winter reduce watering.
A well draining and aerated potting mix is needed. Something like 1 part peat, 1 part barky soil and 1 part coarse sand is a suitable mix.
Once again because it's a slow growing plant it does not need to be re-potted every year. Once every 2 or 3 years should be fine.
I would feed this plant once a month from April - October with a diluted liquid fertilizer. It wont need quite as much or as often as many other foliage plants because it's so slow growing.
Average to above average humidity levels are best suited. You may want to improve humidity levels with a humidity tray or electronic humidifier if the plant has problems associated with dry air conditions, such as brown leaflet tips. To improve humidity mist the leaves during the summer and when the air is dry in the winter.
In the right setting with good conditions a plant can produce offsets which can be removed and re-planted to produce a new sago.