Secret dieting tips?

I joined a contest kinda like “The Biggest Loser” through a fitness club.
I am 29 and have over 100 lbs to lose. I have not done any significant physical activity for a couple years.
I am going into the 2nd week of the contest. I lost 6 lbs the first week.
I have cut my caloric intake to about 1000 a day and I am working out 5 times a week (cardio and some weight training).
Does anyone have any tips to quick weight loss?
Are there certain foods to stay away from that are not as well known? (obviously, not sweets, low carbs, low sodium, no sugar soda). I was thinking about trying the cabbage soup diet one week (the contest is 8 weeks long).
I plan on this being the ‘kick-start” to my weight loss. I will be joining weight watchers after the contest is over.
Can you drink too much water? And what should my heart rate get up to when doing cardio to maximize the fat burning.
Diet soda or no diet soda?
I’m in it to win!!!

This is the Pearson Diet

Week one
Day one. Breakfast…. Glass of milk, Banana and a Apple.(apple is neg 50 cal. so eat as many through out the day as you can

Lunch. 2 glasses of water green beans. and an Orange ( dont eat corn at all.Theres enough corn in everything you eat look on the lables of you food corn syrup is in everything and its really not that good for you)

Dinner Chicken noodle soup,and 1 glass of OJ. Stay away from eating anything after 7pm

Snacks should be dryed fruit if possible.

Day 2 Breakfast 2 poptarts 1 glass of milk

Lunch. A Salad no lettice cucumbers carrots cabbage ect. 2 glasses of water.

Dinner Kiwi, Watermelon and a banana 2 glasses of water.

Day 3-7 Breakfast Chereos

Lunch Cabbage soup As much as you want eat as much fruit as you would like but no bananas. Drink Cranberry Juice.
Dinner Cabbage soup 4 glasses of water

Day 8. Breakfast. Strawberrys and bananas in milk eat as a cereal or as a drink in a blender. Both are good.

Lunch 1 Steak and a potato 3 Glasses of water

Dinner. a Fruit salad 2 glasses of water.

Day 9-11 Breakfast Apples dipped in plain yogurt. and a glass of Milk.

Lunch Cabbage soup. Water as much as you can drink.

Dinner.Cabbage soup 4 strawberrys and a glass of milk in a blender . As much fruit as you want no bananas.

Day 12-14 Breakfast Granola bar and a poptart. as much fruit as you can eat. cranberry juice.

Lunch Plain yogurt. water, Any green veg. and any fruit you want your choice, even a banana.

Dinner Cabbage soup.

Day 1,3,6,,8,11,14 Run 2 miles.
Day 2,5,13 Do 50 push ups and 50 sit ups
Day 4,7,9,10,12 Go to the gym and work upper body on the even number days and lower body on the odd days