I have read high carb/low fat diets, high fat/low carb diets, and cyclical diets that mix high carb days/low fat days with high fat/low carb days. I have even seen a "1/2 timed carb diet," which calls for high fat/no carb in the morning and then no fat/high carb at night (or vice versa if you train in the morning). Putting all these together, it seems like the golden rule is don't mix fat and carbs at the same meal. And, of course, always have protein at every meal, whether a carb or fat meal. Could it be that simple?