I stopped reading when he suggested dumpster diving.
Go to a bakery right after they close. There will be garbage bags full of bread (and nothing but bread so it's relatively sanitary) that was baked that day. Even if you don't eat any, it will probably change your perception of waste.
I knew someone in college who ate nothing but mac and cheese. After a few months his hairline started to recede. When this happened he started eating cheeseburgers every now and then and it grew back.