Try to eat only fresh food in it's most natural state. Do most of your grocery shopping around the perimeter of the store, staying out of all of the boxed and canned goods. Most importantly, read the ingredients list. Put it back on the shelf if it has sugar, high fructose corn syrup, or any other ingredient that you cannot pronounce.
I’m a fan of creating rhyming phrases to help remember important things. Hence the title: Single ingredients over expedience. I hope it helps you remember this healthy tip when you’re eating out, shopping, and preparing a meal.
Counting the ingredients in the food you eat will help you avoid high fructose corn syrup and other additives that do nothing to keep you going healthy and strong. Avoiding these additives will also help you ease indigestion and other nasty things. If a food has more than 20 ingredients, don't eat it at all. If it has more than 10, eat it rarely.
I often used to buy something at the grocery store because it was on sale, planning to using it in a specific dish that I thought would be cheap. But add a bunch of other pricey ingredients, and it doesn't work out that way! Now I buy items that are on sale and that go together!