1. stop drinking calories
2. no snacks period
3. cut each meal in half, literally. save the leftovers for the next day
you can eat anything you want, just less of it
1. That doesn't mean diet drinks. Water only.
2. No.
3. No.
Snacking is an excellent way to lose weight, especially if you're cutting meals in half. Keeping a steady source of calories (good calories) keeps your metabolism going strong.
You don't eat anything you want. At all. Not even close. You eat as much as you want of lean protein (Turkey, Fish, Chicken) and green veggies (fruit is loaded with sugar). It is a game of limiting carbohydrates. You can eat 1500 calories of ice cream a day vs 1500 calories of lean meat and veggies. You will not see the same results. Not all calories are equal.
As far as snacks, get you some apples and cashews or almonds. Apples have little sugar, a lot of fiber, and are perfect for regulating blood sugar.
Cashews/almonds have protein and loads of good fats without a lot of sugar.
If you want to get to a healthy body weight, high protein, high GOOD fat (animal fats, omegas, etc), low carbs. Start with 150 carbs a day. Cut down to as low as you can handle. You'll learn to listen to your bodies cravings. I lost 60lbs in 4 months doing exactly this.
You can't eat whatever you want. You can't drink zero calorie sodas and expect a big difference. Studies show that the perception of sweetness even in the absence of actual sugar (like artificial sweeteners) can drastically effect insulin levels and actually increases sugar cravings.
Drink water.
Eat clean.
Workout.
The only flexible part of this is your workout. It doesn't matter that you have a strict lifting regimen. What matters is that you're moving and working 30 minutes a day. For getting ripped, I switched to nothing but squats, deadlifts, pushups and pullups. Compound lifts that work multiple muscle groups while using a minimal amount of time. The more muscles you engage and tear down, the more calories your body will use.