Rule number 3 in the book is: Avoid food products containing ingredients that no ordinary human would keep in the pantry. Start flipping around the items that you eat on a regular basis and checking out the nutrition information. If there are ingredients that sound more like chemicals than things like flour and water, then maybe it would be wise to search out a better option (Rule # 2 is: Don't eat anything your great-grandmother wouldn't recognize as food.).
Lets look at an example. I have been recommending to many in my life that white bread be replaced by wheat bread.
Point # 1: I know that white bread "tastes" better but that is because most are just giant loafs of sugar. As with any switch there is some level of trial and error. Keep trying different brands until you find one that you could see yourself eating on a regular basis.
Point # 2: Be careful of the packaging tricks. Just cause it says is 100% Whole Wheat does not mean that it is the best option. Here is the ingredient list from a "100% Whole Wheat Bread".
Unless you decide to make your own bread, it will be a little challenging to find a bread nutrition label without some of these scientific crazy ingredients. The point is to start looking and make yourself aware of what you are stuffing in your mouth, especially the foods that are a regular part of your diet. If you find that the "healthier" options are too expensive/out of your budget, then maybe you should just limit the frequency of this item from your diet. A little less bread is usually a good idea for most.
What if you are eating out on a regular basis so you can't see the labels? This should also be questioned because who knows what is going into the food in restaurants these days.
So that is your challenge, take a look at your food and make note of which need to be replaced. If you find something you like, post it for others to try. Maybe we can lessen the trial and error process on processed food, ha!