I always do what Chary does and take it off the heat. However, for something like brown rice, you do have to boil it longer. I also don't worry about having too much water. If there's a lot of liquid at the end and the rice is soft, I just strain it. I also at least rinse my rice before cooking it, and sometimes I give it a soak for an hour or two. I am weird, but I HATE the smell of burnt rice.