move them to the tropics and plant them there.

Otherwise, you will need to water them well (thoroughly washing salts out of the soil and be sure soil is really well-draining), keep them in as bright light as possible and take outdoors as often as you can. There are people on these threads that succeed with them as house palms, but there are so many palms that do better and look better that why try?

They pretty much love Humidity! Give them that any you will have no problems as long as its not too cold and not too hot! They seem to grow best in a little bit of shade. I dont have a very hard time with my little majesty palm as a house plant and my 10 footer is going inside for the first time this year. They are so nice and cheap that I think its worth bringing them inside. I got mine for only 40 dollars and its 10 feet tall! I dont even have a place to put it inside!
Good luck!
-Alex

They may love the tropics, but as Tropicalzone says, they MUCH rather be kept on the COOL side when in the home over the winter. Why? They are quite prone to scale in the average-American, over-heated house. Keep the cool, humid on the dry side (in terms of soil conditions).