What is the best way to quickly lose weight?

Diet and exercise: Limit the volume of food you take in, and eat more protein with less fat and less carbohydrate(sugar) in addition walk 5 miles a day.

Quick is NOT Best.: Eat healthfully. Try to eat at least 5 servings of vegetables & 4 of fruit per day. Increase nutritional fiber. Avoid refined sugar & junk carbohydrates. Avoid alcohol, sweetened juices, soda & caffeinated beverages. Aim for 7.5 to 8 hrs of sleep / night. Hydrate w at least 64 oz of water / day. Calories burned must > calories consumed. Do both cardio & weight training.