It's been a little over two months since I started logging my food intake and activity. It's been an interesting behavioral experiment. I definitely have noticed that I am more aware of how much am I eating.
For example, if I have a particularly gluttonous day, I will significantly reduce my calorie intake for the next day or two. Or when I look back on the week and notice that I haven't been consuming as many greens or vegetables as I might like, I try to self-correct.