There are many ways to cook rice, but here is a basic method:

1. Rinse the rice in a fine-mesh strainer under cold running water until the water runs clear. This removes excess starch and dirt from the rice, and can help prevent the rice from clumping together or becoming mushy.
2. Measure the rice and water. For most types of rice, the general ratio is 2 cups of water to 1 cup of rice. However, different types of rice may have slightly different water-to-rice ratios, so it's a good idea to check the package instructions or do some research to determine the correct amount of water for the rice you are using.
3. Add the rice and water to a saucepan or pot with a tight-fitting lid. You can also add other ingredients, such as butter, salt, or broth, if desired.
4. Bring the mixture to a boil over high heat. As soon as the water comes to a boil, reduce the heat to the lowest setting and cover the pot with a lid.
5. Simmer the rice. Allow the rice to simmer, covered, for the amount of time specified on the package or as determined by your research. Do not lift the lid or stir the rice while it is cooking.
6. Fluff the rice and serve. Once the rice is finished cooking, remove the pot from the heat and fluff the rice with a fork. This helps to separate the grains and gives the rice a light, fluffy texture. Let the rice sit, covered, for a few minutes before serving.