Earlier quoted context omitted.
Write down what you eat. Even if you change nothing, you'll re-consider grazing/snacking. Write it down before you eat it for extra effectiveness. Shameless plugs in my post history. But to be clear, even a sheet of paper can be tremendously helpful.
As a person who recalls every bite and gains weight at one meal a day with no snacking at all, this is not helpful. I'm still looking for advice on why I'm being told to count my food intake in a lisp discussion.
As an aside, obesity is a disease that hormonally and mentally encourages self deception. The point of writing everything down and (most importantly) translating this list into objective calorie counts (usually looked up from a third party reference) is to remove this self deception. It is one of the most effective ways to leverage logic and willpower over habits and hormones. There are other ways of course.