It makes a good cooking liquid for rice. Once the rice is cooked, I add frozen vegies and leftover pork. Then, I taste it and add what ever flavors are missing. (that, or I taste it first... then also last..)
Fish is done when it changes from the raw fish color to the cooked fish color. For fish that is going to be fully cooked, take it off the stove just before it get to the point that it "flakes" by the time it's out of the pan and onto the plate, it should just be starting to do this, and be moist, not bone dry.