^This is all good information, EXCEPT the recommendation to swap soda for diet soda. Soda is bad, diet soda is worse. The sugar replacements in diet and low-calorie drinks make you thirstier and crave sweetness more. Plus several of them have adverse effects on people in a variety of other ways.
Beverages are some of the worst offenders when it comes to high-calorie foods. The best thing to do is remove sodas entirely - swap them for 2 litres (half a gallon) of water per day (lightly flavoured if necessary), along with plenty of milk. A litre/ 1 quart of milk has 30 grams of protein, good fat and natural sugar. It is a complete meal in itself.
Even fruit juice you should keep to a minimum. Have actual fruit instead.