The people above are telling you not to take fatty dressings with your salad.  This info is a bit incomplete.  Olive oil and walnut oil both are very good for your health as they are essential fatty acids which are normally devoid in most westen diets.  If you don't get enough you can end up with dry skin and various other health problems.

My Mom has been doing really well with her weight loss by cutting out bread and potatoes along with walking more.  Never starve yourself but make sure you're eating foods with plenty of nutrients in them.