My doctor told me that losing weight is 80% diet. I believe it. I worked out every day for six months and didn't lose a pound. I did 30 minutes on the treadmill and also walked my dog for 30 minutes every night. My down fall, I'm a carb addict. She said take a look at people who have gastric bypass surgery. They can't eat very much and lose weight rapidly because they take in very few calories.
I only started losing when I stayed away from the bad carbs, anything white (flour, sugar, pasta etc) and when I started lifting weights. I don't just lift light weights. I keep increasing the amount and do a variety of free weights plus work out on the equipment at the gym. I break into a sweat while weight training and keep my heart rate up so I'm burning fat and building muscle. I do weight training three days a week and cardio 3 days a week. It's important to mix it up so your body doesn't get used to any one exercise. Simple answer as above, eat less and exercise more.
Kath