Here in the US, we're obsessed with thinness, yet we have higher rates of obesity than most countries. This is likely due to our sedentary lifestyle. Cars being used for things we could walk or ride a bike to, poor public transportation, the excessive number of hours people watch TV, etc. There are many health risks associated with obesity - diabetes, heart disease, high blood pressure, stroke, kidney and gall bladder disorders as well as surgical and child bearing risks. The incidence of obesity is higher in the Midwest, and among the lower classes, poor, older and less educated.
Obese people are more likely to eat due to external cues rather than internal ones.
Set reasonable goals. Drink a lot of water - drinking cold water helps you to burn a few calories, too. Some people do better with a club - moral support. Eat only when you' re hungry. Alcohol enhances the carcinogenic effects of tobacco.