The other advice that I give is for them to eliminate sugar/sweets from their diet. Drinking and eating foods high in sugar is bad for your health and can lead to diabetes but can also lead to weight gain and obesity. Instead, I tell them to substitute their sugar cravings with fruits and or low fat yogurt as a healthier choice. For snacks, I suggest for them to include lots of nuts as they are a good source of dietary fats. As for beverages, I tell them that they should drink at least 1L of water a day instead of pop and or juices. Drinking water helps you feel fuller and keeps the hunger feeling at bay all day. Furthermore, water promotes weight loss, and keeps your organs hydrated so they can function properly.
In all it's all about living a healthy balanced lifestyle. Developing healthy eating habit can be difficult, that is why I also tell people to include a CHEAT DAY in their diet. On the cheat day you can eat anything you want from anywhere. In return the cheat day helps you stay committed to your goals of eating healthy and not destroy your diet.
If you don't know how to cook or how to get started. I suggest you pick up this book Abs Diet and you can also visit the website http://www.absdiet.com/uof/absdiet/ for more information. It is the best dieting book I have read. This book is actually what put me back on track and taught me how to be a better cook and stay fit. The book teaches about the benefits of many foods, what kind of food to include in you grocery list, what to eat at a restaurant and many other benefits of healthy eating. . To top it all the recipes are great and tasty.
For better results you can include this workout The Deck of Cards part of your weight loss goals.