Tape recorder?
On Oprah yesterday, a woman said that carrying/writing in a food journal was inconvenient for her. So she carried around a little tape recorder and said what she was eating and why. Then, at night, she listened to the tape to figure out what her weaknesses were, what types of situations she was in when she ate, how she felt, etc.
It sounded like a neat idea, but it might be time consuming and inconvenient to listen to it at night. Plus, you'd have to figure out what to do when you're eating in public, like at restaurants, the mall, work, etc.