When trying to shed pounds, forget unrealistic, size-two standards — even if that’s what you weighed on your wedding day. Going to extremes for weight loss can make you feel worse about yourself — and a healthy body image is key to a healthy lifestyle. Most people overestimate how much weight they can realistically lose — and get frustrated when they “fail.” Talk to your doctor about your weight, and figure out what a healthy weight-loss goal might be. If you have a lot of weight to lose, start with smaller goals, like 5 percent of your body weight. Keep in mind that losing more than two pounds a week is unrealistic and usually unhealthy. If you don’t institute changes that you can stick with, the weight will come right back as soon as your diet has ended.