Limiting quantities can be a bad idea - it can essentially create the illusion of healthy weight loss when all you're doing is starving your body. In some cases, the reduction in food can actually cause weight gain as your body reverts to survival mode and begins to store energy for possible future starvation. The key is balance, balance, balance. You've taken the right steps by cutting out the sugars but decrease your intake of useless nutrients like white processed flour (pastas, white breads, rolls, etc.) in addition to starchy or useless foods with barely any nutritional content (potatoes, iceberg lettuce, celery, etc.). Avoid foods with corn syrup or artificial sweeteners, and do NOT drink diet soda - regular soda is bad enough for you already. Stick to minimal amounts of fruit juices and water, water, water. Cut back on pork and beef, choosing turkey, chicken, or other lean meats instead. Beware of 'boneless' meats as these as mostly less desirable parts of the animal mixed with the "good stuff" then solidified with chemical stabilizers.
While the "no carb" fad diets have *SOME* truth to them, most of them are basic baloney and the long-term effects of such dieting is unknown. Moreover, in some cases, low carb-advertised foods are low in carbohydrates but are lacking in vitamins, fiber, or other beneficial nutrients - it works out that you would actually eat MORE of the food in order to get the same amount of nutrition out of it. Oh, and finally, increase your leafy vegetable intake - romaine lettuce, bok choy, spinach greens (baby spinach is excellent in salads and cooking), kale, mustard greens, collard greens, and other vegetables are full of vitamins and other essential nutrients which can promote healthier diet.
With respect to exercise, realize that spot reduction is IMPOSSIBLE - fat doesn't discriminate as to where it accumulates, and does wherever it feels like. Moreover, most people make the mistake by jumping directly into a fifty-minute jog at breakneck speed, then stop and drive home from the gym. Essential to cardiovascular exercise is the idea of 'warming up' and 'cooling down.' For most people, this can entail working your way up to a full jog over about five or ten minutes, and as little as five minutes of slowing down toward the end of the workout. This builds endurance with your heart as well as helps you maintain a more constant elevated heartrate throughout the workout, which is essentially what will help you drop pounds.
Edit: Good luck, and remember that eating healthy is a lifelong decision - it's not something you can do "on and off." While it is permissible to diverge from the diet every so often don't ever expect to go back to your old eating habits - lost weight returns in a tenth of the time it takes you to lose it.
