Every time I added a food entry, I had to document my level of hunger and note whether I wasn't hungry, was somewhat hungry, or was very hungry. I also used the hunger scale and put a number value before eating, with 1 being ravenous and 10 feeling sick and painfully stuffed.
I liked asking myself if I was truly hungry when I sat down to eat. Seems simple enough because duh, why would I eat if I wasn't hungry? But this little feature made me realise how often in the past I was eating out of habit, because it was a certain time, because other people around me were eating, to make me feel happy, or prevent boredom. All of that extra eating when I wasn't physically hungry was the reason I was feeling so bloated and had gained weight.
If I sat down to eat when I wasn't hungry, but instead was feeling stressed or upset, then I said to myself, "If I'm feeling __________, then food is not the solution." It helped me find a different way to cope, like calling a friend or going for a walk (we call this primary foods), which was actually way more effective than eating.