Celery adds wonderful flavor to recipes and is great for a lo-cal snack. The thick bottom part can be very bitter especially in wild celery. You want to use it within a couple of days, because once it starts to wilt it releases more of its oils, which are said to contain carcinogens and can be very bad on contact with skin. The leaves are the most flavorful so don't throw those away.

Celery that has gone soft can be re-crisped by adding a little water and storing in the refrigerator.

I really love the combination of onions, green peppers, mushrooms, and celery. Cooked or raw, those flavors work well together.