Portion control is extremely important. You can eat clean all day 100% of the time, but if you are over-eating you will not lose any weight. The problem is that you may not always have a measuring cup handy. Here is a little picture to explain how to eye up your portion sizes without measuring everything out!
Recipe of the day: Green Goddess Pasta Salad with Chicken http://www.cleaneatingmag.com/recipes/classics-made-clean/green-goddess-pasta-salad-with-chicken/
popefitness.com 
This is helpful!