I just got a Fitbit. The iPhone app that comes with makes it really easy to track what you eat and the corresponding calories. I have lost weight mostly due to that.
I just do not want to record a snack of Doritos (100s of calories) versus a snack of a carrot (30kCal)
This is great, but beware of the relaps. Can you make this a habit? If you have to fight it, you'll lose in the end. Now the Fitbit is a new gadget, really nice app, but what happens in three weeks? Will you still fill in all your calories, and be ashamed of that doritos?
Do something that creates a habit, something that you don't have to put effort in. That will continue to work.
I just do not want to record a snack of Doritos (100s of calories) versus a snack of a carrot (30kCal)