Avoid processed foods
All food is “processed” one way or another, so understand that every processed food is not necessarily bad. While doing your grocery shopping, always examine the ingredients and the nutrition labeling of the food item.
Remember, that processed foods tend to contain more sugars, salts, and fats than we need. It may be tough for you to start cooking at home regularly but once you start, you will find it relatively healthy and cheap. After all, good things always come with a price.