Filter your source of drinking water. Our water supplies are contaminated with various chemicals, while chlorine and fluoride are also carcinogens. Distilled or Reverse Osmosis would be ideal. If you can't afford those, a simple ceramic carbon filter is better than nothing. Drink more water Water is critical to good health. Our bodies are over 80% water! Water carries out many functions in the body -- it lubricates, carries nutrients, flushes toxins, cools, etc. Many diseases have been linked to dehydration or lack of water. Sodas, coffee, alcohol etc do not count; in fact, these are harmful beverages which actually dehydrate your body. Freshly squeezed fruit and vegetable juices as well as herbal teas are good. This is perhaps THE most important of this list of good health habits. Go vegan There are different schools of thought as to whether humans are meant to eat meat, and whether going vegan would result in any nutritional deficiencies. Personally, I believe that we do not need meat -- after all, there are millions of healthy and strong vegetarians in the world . Eat a variety of whole and natural foods Whole foods have many health benefits. For example, they contain more nutrients and fiber than processed foods. The nutrients in whole foods are also better assimilated by the body. By eating a variety of whole foods, we would thus be getting all the different nutrients which we need; try to have a colorful diet - i.e. fruits, vegetables, beans, etc of different colors. Processed foods, on the other hand, are unnatural and often contain a load of chemical additives and preservatives. Our modern day diets are a disastrous combination of too much processed foods and very little whole foods.