Change the bread in your lunch sandwich to a low fat bread like Arnolds or Pepperidge farms Sandwich thins. Two pieces is 100 calories compared to regular bread that has 110 calories per slice.
Switch from regular soda to diet, or even better, flavored water. Each 12 oz can of soda averages 144-160 calories. Diet soda and water = 0.
Change your condiments; Regular mayo has 130-150 calories a tablespoon. Hellman's Light has 35.
Saute your veges in Pam, not olive oil or butter. Depending on which you use, you could save 200-300 calories per serving of food.
Simple.
I like simple.