Conventional nutrition advice tells you to make healthy choices (like eating a salad instead of a chocolate bar). But that's stupid advice.

As you'll see in the thread below, and in @whsource's book, human beings are hard-wired to make unhealthy choices. https://twitter.com/RokoMijicUK/status/1339253136993738752

You cannot un-hack your own corrupted, flawed brain. You cannot fight it.

Instead of trying to make healthy choices, you should try to remove choices. Eliminate the option to buy any calorie-dense foods ever again in your life.

In practice this is hard, but there are a few things you can do right now to help.

The number 1 solution to this is to do a big meal prep and store pre-made food that you rationally decide, weeks in advance, is the right food for you.

Avoid like the plague making a choice about food that you will eat that day, because these choices will activate your compromised hard-wired food choice algorithm (which is a calorie-density x calorie total maximizer).

You will do best in this area if you assume that you have almost no willpower.

If you work near a vending machine, go to work without money. If there's a free calorific drink machine at work, as for it to be removed, or maybe ask to work from home so you can avoid it.