Have you thought of making hummus? Its pretty cheap plus tastes better.
For your salad, are you buying packaged salads or lettuce?
We usually go through 1 loaf of bread every 2 weeks and otherwise don't really buy bread. We do go through about 1 large container of soy yogurt every week. Various veggies/fruits we buy at the asian market/farmer market and then beans and lots of beans

I still buy some stuff from Costco like frozen berries but I've found some better deals on other stuff and its fresher.