Meat can be expensive, and while you don't have to avoid it completely, I found that building roughly half my meals around plants helped cut down on my shopping budget. Protein-rich foods such as beans, nuts, seeds, and whole grains — and even animal-product-based items like eggs and cheese — are less expensive than cuts of meat, while still helping to keep you on track with your goals. Eat a heaping portion of vegetables at every meal, too, as they're very filling.