While the concept of counting calories has a bad rep, many of the successful programs recommend it. Not to under eat, but to help you find the right balance of carbs and proteins, and to also make sure you get enough, and also not over eat. The key is to find the right balance.

Calorieking offers a set of databases in many different formats and platforms so you can track the nutritional information of what you’re putting into your body.

In the past I’ve used their palm version to keep track of what I was eating on the fly.

Thanks to Diana Rowland for link