Here's a great site on vegetarian nutrition. Even if you can't get away from being a full time carnivore, it's great for your health to have a couple vegetarian meals a week (or more).
Vegetarians do not eat meat, fish, and poultry. Vegans are vegetarians who abstain from eating or using all animal products, including milk, cheese, other dairy items, eggs, wool, silk, and leather. Among the many reasons for being a vegetarian are health, ecological, and religious concerns, dislike of meat, compassion for animals, belief in non-violence, and economics. The American Dietetic Association has affirmed that a vegetarian diet can meet all known nutrient needs. The key to a healthy vegetarian diet, as with any other diet, is to eat a wide variety of foods, including fruits, vegetables, plenty of leafy greens, whole grain products, nuts, seeds, and legumes. Limit your intake of sweets and fatty foods.
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