If I could pick one of all advices you gave this is the one which I think has more impact. Free yourself from food slavery.
If I am excising well, think marathon buildup.. extra carbs do not make me feel any different. Greasy and fried food gets me, but not carbs.
If I am not exercising, almost any reasonable of carbs makes me feel terrible.
Hard to just pick 1, but I do think exercise wins for me by a small margin over clean eating..
French fries are on my never ever touch list, along with soda and a few more items.
If I could pick one of all advices you gave this is the one which I think has more impact. Free yourself from food slavery.