My trick for cooking rice in a rice cooker is to add one teaspoon of salt, one smashed garlic clove and one tablespoon of extra virgin olive oil per cup of rice to the water and rice in the cooker before cooking. Every now and then I use chicken broth instead of water for a nice flavor twist.
A good rice cooker should reside in the kitchen of every self-respecting cook. They make rice quick and easy. I use rice in at least half of my dinners. Below are a few links to some good rice cookers, varying in price. Yankees suck!