The National Institutes of Health has a printable daily food and activity diary on its website that is free to download. The diary allows a person to keep track of the foods eaten for breakfast, lunch and dinner. This form also includes sections for recording physical activity and special notes about diet plans. There is room at the bottom of the form for making notes of behaviors associated with food.
According to About.com, actively keeping a food diary is a step in the right direction for understanding why you eat certain foods. Anyone who wishes to lose weight can use a food diary to identify weak points when it comes to food choices. When getting started on a diet plan, a food journal can be used to monitor eating habits.
The Cleveland Clinic notes that food diaries are proven to be highly effective for helping people change eating habits. Honesty is the best policy when using this method. Diaries can highlight foods that are eaten during a stressful period of time. A person can also identify a tendency to skip meals or eat more during certain times of the day. For instance, eating while bored is a common reason that people overeat.