This may be TMI: but if I'm a very good girl and follow Primal 95% for a couple weeks with no snacking, I get a pretty consistent *ahem* good bowel urge within 10 minutes of breakfast, days in a row, usually followed by a pound or two of fat loss and a smaller stomach and a little more self-confidence. I wonder if this is a sign of ketosis, or just efficient body fat burn.
Urban forager, with some practice, you can "eyeball" your calories by sight. Take a few pictures of a typical day's food. Find a good calorie counter (I use fitday.com), and enter it in to see where you are. Adjust the portions or whatever to find a the calorie level you want. Prepare another day of food, again taking pictures. Now line up the pictures to get an idea of how big the lumps on the plate should be.