People often ask, "If there was just one thing I could do to help me lose wieght, what would it be?" My answer is to pay attention to portion sizes, it's more about how much we eat than eliminating certain foods. (that is, if all the other good habits are in place, like exercising regularly, eating healthy foods. etc).
Many marketplace and restaurant portions are much larger than standard portions--and bigger portions have made us bigger eaters, according to a couple of recent studies. It's easy to lose touch with what a real serving size looks like when we are offered larger servings.
The best way to combat portion distortion is to learn what a healthy portion looks like, beginning with the foods your family eats most often. Here's a handy guide that I've been using as I give health talks within the company. Taken directly from Cookbook for Women, many people have found it very helpful.

If you're still hungry after meals, increase your vegetable portions--that's one place where you can eat more than the standard serving, because veggies are so full of many nutrients and help you feel full with fewer calories than many other foods. And, drink more water!
A vegetable favorite of mine is Herb-Roasted Vegetables and yes, I'm serving it for Easter dinner, along with Italian Roast Pork with Rosemary.
http://www.bettycrocker.com/recipes/recipe.aspx?recipeID=33174&Source=SearchResultPage&terms=roasted%20vegetables