I have a few points you might be interested in. First if you don't want to really change your eating habits you can downsize portions. Use a salad plate instead of a dinner plate and jut eat less of what you normally eat, increase water to 8 glasses a day or more and get some type of exercise in.
2nd, you can try diets that don't count cals or fat. Atkins is good. but you have to keep count of carbs you eat, Fit For Life is great too because there is no counting involved it seperates food groups. It's a food combining diet that works but is a little difficult to do , but not impossible.
Hope I was some help. But here's a diet that will get off 20 lbs fast. The scarsdale medical diet. It outlines what you can eat and when and all that and really works. Here's the site http://lowcarblisa.tripod.com/thescarsdalemedicaldiet/
Hope I was some help and good luck on your weightloss journey!!