Just came across a Gallup poll -- How Americans Who Have Lost Weight Made it Happen -- and thought this was interesting:
Gallup’s annual Health and Healthcare survey results reveal the top weight loss tactics Americans say they have used successfully. The 52% of all U.S. adults who say they have succeeded at losing weight at some point in their lives were more likely to credit dietary changes than exercise.
The top three diet-related tactics Americans said they used were eating less, counting calories/portion control, and eating more natural foods. In terms of those who relied on exercise, just working out in general was the most frequently mentioned form of activity.