It started for me in 2002, with an article called 10 Foods that Pack a Wallop, in Time Magazine. (Link attached.)
The foods were: tomatoes, spinach, red wine, nuts, broccoli, oats, salmon, garlic, green tea, and blueberries.
It made so much sense to me. If I am going to take the time to eat (hint hint Char) then what packs the most benefit? Also, except for oats, I love all of those foods, and I have nothing against oats.
Superfoods RX came next, and the 14 foods were: beans, blueberries, broccoli, oats, oranges, pumpkin, wild salmon, soy, spinach, tea, tomatoes, turkey, walnuts, and yogurt.
I've read this one cover to cover a couple of times. It is such an easy read for helping you to understand micronutrients and why each food is so amazing. It has enough recipes in it that you can try new things, without actually being a 'Plan." I LOVE this book, and recommend it completely. The other 2 from the same guy are more meal plan in one, and regurgitation in the other. I found them used and because I happen to teach yoga teachers, I collect things like that. I've skimmed, but never read them.
I also found SUPERFOODS (The 50 best foods for you) in a used book store, and I really like this one too. I took a picture of the 50 foods (below), and LOOK! Ya'll still get to eat deer. Yay!
The simple logic of narrowing down my shopping list by prioritizing the healthiest foods above all made so much sense to me, and I built my shopping trips and weekly meals around those foods for years. I guess I still do, but it's now a part of me.
Anyway, anyone who is interested in this idea, it worked for me. Looking at the lists of foods, you can check off which ones you like, which ones you know, which ones you have access to, which ones fit your lifestyle, which recipes you have or dishes you like that can use these foods, and ... off you go!