A great source of protein for your diet is Greek yogurt. Greek yogurt, especially the non-fat kind, is a great substitute for sour cream in recipes. Actually, it can take the place of almost any creamy ingredient. Add protein to your diet by eating more Greek yogurt.
Instead of eating the whole egg, eat just the whites instead. The yolks in eggs contain more cholesterol, so the egg whites are better for you. One whole egg should be replaced with the whites of two eggs.