Depending on if you want to lose to weight, or stay at your current weight you really need to calculate the time your working out to what you're eating accordingly. If you want to lose a lot of weight it's discouraging to say but working out is about 30-40% when the other 60-70% is what your putting in your mouth. Really focus on your food, when you're eating that is all you should be doing. People, women especially will eat about 50 calories more if they're not focused during their meal. When you're watching TV, or finishing up homework you tend you over eat when your mind is more focused on something else.
Portion control and eating healthy is more effective then just going to the gym. Now that doesn't mean skip the gym or cancel your gym membership. Physical activity along with a lower-calorie diet can ensure that most of your weight loss comes from fat as much as 98%, according to the National Institutes of Health- rather than from metabolism, fueling muscle. Try and get atleast 30 minutes or more a day of exercise 4-5 days a week.
Out of the all the snacks out there now a days it's so easy to walk with a bag of chips on the street, or have packaged containers of food that fit in your car cup holder when you're picking up the kids. Try and keep a food journal of everything you eat and what times you're eating your meals and snacks. I promise when you read what you ate and put down for the day, you will defintely change your eating habits. I've totally been grossed out when I see what I ate in one day on paper, it's definitley a reality check. So please give your food your full attention