The test of a good cook is the way she cooks potatoes. Housewives who take pride in cooking meat to a turn often serve up wet, mushy potatoes that are as tasteless as they are unappetising. Make the best of your potatoes. They are worth it. Potatoes give you extra energy and guard you against infections. They are cheap and home-grown. Follow the potato cookery rules and you'll get new enjoyment from the homely potato. STORAGE HINTS Potatoes need treating kindly. Keep them in a dark dry place well protected from frost.