Managing weight is key to preventing diabetes according to the article. Obesity has fueled the rise in type 2 diabetes cases. The article recommends avoiding fast food and sugary, high carbohydrate foods to manage weight. In addition to diet, regular exercise is important as it improves blood sugar control and helps maintain a healthy weight. Keeping track of glycemic index values can also help choose carbohydrates that don't spike blood sugar levels as much. Genetics play a role, but lifestyle changes around diet and exercise can prevent many diabetes cases.