The Military Diet lets you lose up to 10 pounds per week without strenuous exercise or prescriptions. And best of all, the Military Diet is free! The 3 day military diet plan is probably less expensive than what you're already eating.
Not all of these are healthy substitutes in my opinion, but some are, so use your own judgement. 20 Unique Healthy Food Alternatives --I'm interested to read about some of these things, and I know some of the substitutions only work in some circumstances.