Satine, in terms of a plateau, I never hit a huge one, but I did find that varying the number of calories I was eating from day to day sometimes helped, and especially sometimes increasing my calorie intake.
teacher1, I used WeightWatchers. For the past few months, I have been logging my food in both WW and in MyFitnessPal, so I get the point count from WW and also a calorie count. I like MyFitnessPal because it breaks down what I'm eating into fat, carbs, etc., but I find it easier to think in terms of how many points I have left in a day. I also like MyFitnessPal's integration with my FitBit.
I should probably note that I had breast reduction surgery when I was around 170 pounds (so after the first picture, but before the second and third pics). Best thing I ever did!
Start: March 18, 2012 - 208 lb │ Mini-Goal 1: 5% lost - Met 4/29/12 at 192.4 lb │ Mini-Goal 2: 10% lost - Met 5/27/12 at 185 lb │ Mini-Goal 3: BMI 34.6 (no longer severely obese) - Met 6/3/12 at 183 lb │ Mini-Goal 4: 25 lb lost - Met 6/10/12 at 181.4 lb│ Mini-Goal 5: BMI 29.9 (no longer obese) - Met 8/5/12 at 157 lb│ Mini-Goal 6: BMI 24.9 (no longer overweight) - Met 11/4/12 at 132.2 lb│ Ultimate Goal: Weigh 125 lb by 25th birthday (March 2013) - Met 1/20/13 at 123 lb│Restart: March 2014 at 133 lb │ New Goal: 120 lb