As a very basic starting off point you need an equal amount of boiling water to cous cous & it will absorb all the water. You can add some flavour by using stock instead of water too. Once all the water is absorbed, fluff it up with a fork & add in some butter.

One recipe we have uses orange juice, 2 tsp of cinammon & 2 cloves, boil that up & then add in an equal amount of cous cous to the orange juice. Very yummy