When on a mission to lose weight most successful people take it a day at a time. To focus on the big picture is too much to cope with and overwhelms your motivational resolve. Every individual is different but for many there is a pattern to their eating behaviour.
I recommend you keep a journal of your eating behaviour for a few days. This journal should include changes in routine for example how , what and when you eat when you are working and ion your days off.
The journal should include the exact time you suddenly craved food and what food you ate to satisfy that craving. After a week or so you will notice a pattern forming and with this pattern you can take evasive action to transfer that craving from eating to some other activity to an alternative pleasure. Also it can be used to replace one unhealthy fattening option to a more healthy option.
For example say you can go all day with a healthy diet without much problem. However at about five in the afternoon you suddenly crave carbs and sugars. This corresponds to my travelling home from work and visiting the supermarket at this point. By changing the habit and having a mixed salad just prior to the journey you can satisfy that craving with nutritious slimming food getting through yet another day without breaking your resolve.
Peter Bull ( Author of the book Get In Touch With Your Slimmer Self )