I realized that keeping my portions and food choices in mind was something I was going to have to stay committed to for the rest of my life -- assuming I wanted to keep fitting into my newly aquired "regular size" clothes.
Many of us don't understand what a healthy portion size is, and for good reason. A pasta portion in a restaurant is easily three cups, and many steaks are at least a pound. Getting used to normal-sized portions is not an easy task.