I did 20 lbs in 2 months, but I'm pretty active for a sedentary corporate job and a man of routine and didn't focus on weight but body fat %.
Swim in the morning - every morning.
breakfast/snack = yogurt or protein shake
lunch = chicken wild rice and veggies and go to gym (I'm lucky to have my gym across the street from my work) and circuit train 30 mins.
mid afternoon snack = granola
dinner = 2/3 veggies 1/3 meat 1/3 carb
don't eat after 8pm
Lift at least twice a week in the evening.
rinse and repeat.
Total I went from 230-185 in a little over 6 months. Don't eat after 8pm and be dedicated.