Celery is a member of the carrot family. It is low in calories, high in fiber and a fair source of Vitamins A and B. To pick good celery look for fresh healthy leaves and crisp green stalks. One good lesson to learn about celery is how to strip off the strings. Take a knife to one end of the celery stalk, pull strings out from top to bottom. Do not discard the strings in your garbage disposal, they will cause problems. Celery should be refrigerated in a plastic bag and placed in the crisper for up to two weeks. If the ribs are wilted, separate the ribs and place them in a bowl of ice water for several minutes before use.