I agree that including enough fat is key to feeling satisfied. Saute your veggies in olive oil, put avocado on your sandwiches, include nuts and seeds in all your meals. Also, keep some trail mix or hummus and veggies, nut butter and crackers on hand for snacks. Beans also help to make meals more filling - I found they make a big difference in keeping my dh satisifed on a veggie diet. Soups like split pea, black bean, minestrone, tortialla soup, chili etc. are favorites.