It is as simple as 1, 2, 3 ...
One cup rice to three cups water.
Cook the water, when boiling, drop in the rice, stir a little. When the water returns to a boil, let it boil for a minute (no longer), then turn off the heat.
Ensure the pot cover is in place. Wrap the pot in newspaper, wrap a towel around the newspaper and pot, then place the pot in your bed under the comforter. Let the rice absorb the water for at least an hour.
This procedure works best when the rice is cooked in the morning before you leave for the day. Let the pot sit in bed for the whole day and the rice will be perfectly warm and moist for dinner when you return home.
EDIT: Salt and butter may be added for taste.