myfitnesspal is amazing and just became your best friend when it comes to tracking calories and macronutrients. We're not sure how anyone did that before this app, but it was probably complicated. This makes it simple. The basic version is totally free so add the app to your phone, create an account and begin to get familiar with the interface. You'll find useful tutorials in their help menu if you run into trouble. We'll be personalizing your account at our first session.