4 principles of eating

I have been doing my own research into eating for some time now.  Looking at the different philosophies and what 'evidence' they put forth.  I have come to the conclusion that there is only 1 paradigm and 4 principles that can be followed:

Paradigm:
There is no such thing as a one size diet fits all.  Everybody's body type is different and will process food differently.

4 Principles:

1. Stay away from processed foods.  All of the food we eat is processed to some extent.  The apple is plucked from the tree and transported to a holding warehouse.  It is potentially cleaned at this point and sifted through to see which ones are to be sent to the stores.  The stores receive these apples and possibly wash them again.  Consumers will purchase the apple and take it home. Again, they will possibly wash the apple.  Now that is some process.  So, am I saying don't eat any food bought in stores?  No, what I mean by processed foods is food that has more chemical ingredients than biological ingredients.  But everything is a chemical!  So, am I saying don't eat any food?  No, if you are unable to determine what is a chemical and what is a biological; then the second principle will help narrow this done.
2. Eat foods closest to the source.  When choosing foods to eat, first look at foods that are closest to the source.  No one can argue an apple is about as close to the source as possible.  However, one could argue that high fructose corn syrup is not close to the source at all.  It is a highly processed chemical that comes from a food source, but is no longer that food source. So, when looking at ingredients of foods figure out how close to the food source are these ingredients.  Minimize the number of chemicals you eat.  Just moving to a whole foods (not to get confused with the grocery store chain) eating habit will greatly help.
3. Eat the amount of calories based on your exercise levels.  Americans eat way too much food for how much exercise they get.  I have been guilty of this plenty of times.  People in general need to eat according to how many calories they burn.  If you are sitting on the couch doing nothing, eating a 5000 calorie diet is not going to do you any good.  However, if you are running a marathon every day; eating a 5000 calorie may not be enough.  Look at how much physical activity you get and figure out how much food you should be eating.  This isn't hard to figure out, especially with technology today; but it is a little time consuming and takes some patience.
4. Figure out what works for you.  Since there is no diet fits all, you must spend the time figuring out how your body reacts to certain types of foods.  Unfortunately, there is no easy system for this.  It is a matter of paying attention to how much of what you eat and when and then seeing how your body reacts to it.  If you are not sure where to start, here is a suggestion of what to eat over a 1 week period:
   - 60% green leafy vegetables
   - 20% meats
   - 10% fruits
   - 10% nuts and oils (Olive oil or Avocado oil)
   From this you should be able to figure out what your body likes and dislikes.