Balancing calories

I've just eaten the second leek and potato pastie for my lunch and now feel satisfyingly full! At the same time I was reading a magazine that seemed to be full of things about new year's resolutions, getting fit and healthy eating. I wonder how many calories there were in my pastie and I wonder whether I burned more or less digging up the veg, scrubbing it and making the pastie. It also suggested that lunch should contain protein because protein is an appetite suppressant and that you should save carbohydrates for evening meals because they can make you feel sleepy! Hmmm, the pastie was pure carbohydrate so I'd better grab a cushion and make myself comfy...