how did you loose 100lbs

I started on a modified Optifast (two shakes a day, meal then a snack), did that for 6 months, then went to one shake a day and remaining meals for the day of regular food (for one month). Stopped shakes and started all food Dec 2012. Cardio (5 days a week) and strength training (twice a week), logging everything I eat and most of all willpower (willpower has wained a bit lately, but I am back on track).
Started June 1, 2012, currently (Aug 9, 2013) at 132lb loss, still 7 more lbs to go.

Ate less than I burned.

Specifically, I weighed and measured my food, cut back my eating to proper portion sizes, ate more fruits and veggies, started exercising every day. I don't cut out foods I like. It took 13 months to lose 100#.

Weighed and measured my food, worked out 5-6 days a week, increased fruits and veggies but still ate pretty much what I wanted. It took me about 10 months to lose 100 lbs.

Originally I love 106lbs in one year kept it off 5years gained back 60 after a loss of a family member. Exercise 4 times a week, more veggies and fruit but honestly its all about portion control and logging your food. I never gave up Carbs, actually I never gave up sweets it was all moderation. Now the second time around I have lost 40lbs total I lost weight prior to finding MFP. Good luck to you!

Consumed mostly whole foods, drank high volumes of water and exercise 6 days per week 60-120 minutes

Well I did have WLS, but I work my butt off to keep on program. So, calorie restriction (low carb, high protein) and moderate exercise. Lost about 123 lbs in 16 months and 20 lbs to goal.

Portion control, weighed and measured everything that went in my mouth, cut back on the booze. Home cooked food instead of prepackaged rubbish. Revised all recipes to cut back on cooking oil, butter, fats. Started running, Went to the Gym in winter. Cals in less than cals out. Still ate all of my favourite things but in moderation. Booked a cruise for 1 year ahead as motivation. (Had to lose weight to get into a new tux for the formal evenings) No pills, tablets, or quick fixes. No fad diets. Just MFP forums.
It took me 10 months

I started with Weight Watchers to lose the first 80 pounds in 11 months. Then for financial reasons I quit WW and continued the good habits I had learned and transitioned to MFP. Since I've been solely on MFP, I lost another 27 pounds in 8 months.

In a nutshell, what was different for me this time is I became friends with like-minded people who I could talk endlessly about getting healthy. I weigh and measure everything and try not to estimate anything. I log religiously, even the crap. For the first time in my life, I got moving, for me it was Zumba that changed my whole outlook on activity. I discovered that exercise did not have to be something I dreaded and avoided. I occasionally try weight lifting but I haven't found the "love" for it yet. Find something you love.

I never cut out a food group or something I love entirely, however I am learning what foods fill me up, and which foods leave me ravenous. I am making choices that I can live with forever. I finally realized that it isn't important to have "x" amount of pounds off in "y" amount of time. No matter how fast you get to the finish line, the race is never finished.

I would have to say that finding my PATIENCE and JOY in the journey is what is keeping me on track.

I posted this on your wall too, but figured I'd share here as well.

I lost 110 lbs in about 10 months (from roughly July of last year until mid-March of this year). My "success" story is here as well:

http://www.myfitnesspal.com/topics/show/912120-from-fat-to-fit

At any rate, I started with a low-carb diet to lose some weight quickly. The main reason for this was that I was obese and couldn't really walk/run or do any exercise without severe pain in my legs.

Once I had lost about 45-50 lbs, I ditched the low-carb diet and switched to calorie counting with My Fitness Pal. This was late October/early November, I used MFP's pre-defined settings of a 1.5 lb/week goal which, for me, equated to about 1500 calories per day. I tracked religiously and never once exceeded my daily goal. In addition to tracking, I added exercising and was doing walk/runs daily. I quickly ramped up my distance and basically became a running addict. To this day, I still run nearly daily.

By mid-March, once I got down below 190, I decided to just maintain. My weight has stayed in the 183-188 range since that time. I like this weight. From my previous tracking, I developed pretty good eating and exercise habits. So, I don't really track my calories any more. I do however, still track my weight and exercise and remain conscientious about what I eat. As you may notice from my profile, I set my new baseline at 190 lbs because I don't have plans to let myself exceed that weight again. I want to look to the future rather than be reminded of or live in the past. Effectively, I feel like I closed that chapter of my life by shedding the weight.