I too have lost lots of weight at different times in my life and I used a variety of methods. I once dropped over 50 pounds in a matter of a few months but I wouldn't recommend the method I used that time, starvation.
Another time I lost a lot of weight quick but wouldn't recommend that method either...removing all your teeth.
I dropped about 12 pounds or so after when I was in the hospital in July and have kept it off since and there are two things I would suggest anybody do if they want to lose weight.
1) eat breakfast and don't eat after 6 or 7 at night. Evening eating was my problem for years.
2) get a pen and pad and keep track of what you eat and the calories. I started doing this to control the amount of protein I took in for weight lifting but soon discovered how much easier it makes it to adjust your caloric intake. It's like having a budget, if you don't realize where you're spending your money it's hard to save. Calories in/calories out...simple formula.
Congrats to the OP, good job.