Originally Answered: Fast weight loss tips needed!?
Okay first, you won't lose that much weight without doing something dangerous or stupid. Second, you should just focus on eating less, with more emphasis on proteins and vegetables, and get some form of cardiovascular (aerobic- gets your heart rate up) exercise 5 days a week and for good body tone, do some conditioning work, sit ups, press ups, look up calisthenics, body weight exercises and the like on youtube, you'll find full tutorials of what to do. There's even one that just uses a chair.
The information is all out there, look for blogs with running tips and such, but avoid ones that talk about specific foods to eat, or magic metabolism boosters like green teas. The only metabolism booster is exercise, either cardiovascular or strength.
Use your hand to portion food: hand with fingers outstretched for portion of vegetables, hand with fingers curled in for max portion of carb foods, size of palm for proteins, and a little bit of fat, like a drizzle of oil on a salad, a slice of avocado or cook the meat brushed with oil.
Here's a good way to start:
http://caloriecount.about.com/ - counting calories and macros (that's protein, fat and carbohydrate. It lists vitamin counts, but they're from a user database, so view with caution) and logging exercise
http://www.goodrunguide.co.uk/ - free, independent, ad-free running advice.
http://iifym.com/tdee-calculator/- Total Daily Energy Expenditure (TDEE) estimation. Subtract 500-1000 calories for fat loss.
Remember, if you skip exercise you're going to lose muscle and fat, meaning you'll look less toned and also you may look flabby for longer. ie you lose 20lbs with exercise, you look toned, without exercise, still look flabby and "loose" (as opposed to tight, as in tight abs). So its always good to remember to exercise, cardio 5 times a week, and three times a week do a shorter cardio (20-30 mins) then strength.
This is from a person who's lost 30lbs in 2.5 months. Trust me, do it too quickly and you'll regret it. I only lost that quickly because I was really big to start with (300lbs)