A great idea for leftovers (usually curry in my household) is to store them in those small jars they sell salsa in because it's about a serve. So you can just microwave some rice and mix the leftovers in near the end to warm them up.
And a great technique for cooking rice in a microwave is to put in about half a cup per person and add enough water so that it's about one inch above the rice. Put it on high for about five minutes and then at a lower setting for about that much again. Depending on the microwave you may need to add a little more water and give it another zap until that disappears.