How do I lose weight..I need to lose it in a way it doesnt come back.?

Hi All..This is the question asked by many readers here.
I was overweight for most of my time in the life because I have been fed on junk for a lot many years it was lately when i realized that I need to lose weight and lost 20 kgs by excercising.(that was when I was a student).But since I started to work it was difficult for me to cope up going to the gym and quit it..but then in less than 6 months I regained all of the weight. And now I cannot get rid of the food.I am an indian and a real fan of food.
Lately I have tried taking the wheatgrass shots..Do they really help..
I avoid sugar and oily stuff and avoid rice too(most of the time)
Can you all help me out with an excercise plan and a diet that I can follow to lose weight.
I neeed to lose atleast 20Kg''s in 6 months.
Serious issues..!!
Kindly help..
And i am 21 years old and work for about 17 hours a day..so I really cant go to the gym,..
Tanya..Does peeing really help ??

Christi..Could you please let me know a few excercises I could do in my cubicle..
I do not have the stamina to run .. I dont know I feel tired and disinterested..

Quickest Way to Lose Weight - How Lose Weight Quickly

Recommended Answer:
Losing 10 lbs a month is a good and safe target. Any faster weight loss is likely to be temporary only and in most cases you regain it all.

Running, jogging, cycling, swimming, dancing, push ups, sit ups, squats, brisk walking and power walking all help for weight loss but dieting helps more.

One of the healthiest weight loss diets is the DASH diet.

The healthy DASH diet can help you lose weight safely and effectively, lower your cholesterol and lower your blood pressure.

It is based on an eating plan rich in fruits and vegetables, and low-fat or non-fat dairy, with whole grains. It is a high fiber, low to moderate fat diet, and is rich in potassium, calcium, and magnesium.

You can see further details in a web search for "dash diet for weight loss".

• Pee it out! Drink a bunch of water and it will clean your stomach and pee out a bunch of calories.
• I lost 150lbs over the course of a year and a half. There is no secret. There is not pill. There is no shake.
  
  Eat less calories. 1200-1600 a day. More depending on your energy level.
  
  EXERCISE.