Realistic goals are the key to weight loss success.
The biggest threat to successful fat or weight loss is becoming discourages. Confidence is the key to success. If you create a lofty, unrealistic goal, you are more likely to become discourages. Every day, someone starts a diet looking to lose a massive amount of weight. As a physician, I have found that the most reliable way to predict the failure of a diet is based on the size of the weight loss goal. This method is especially true if you over estimate the weight loss that is attainable over a period fo time. For example, you can safely lose 2 pounds a week, so if you plan to lose 30 pounds in 2 months, you are likely going to fail without a gastric bypass. Even with a gastric bypass, most will be unlikely to meet that goal.
We all know how to set a realistic weight-loss goal, and you need to use a little common sense. I recommend that you look at a short and long term goal. For example, plan for 5 pounds lost in 2-3 weeks and 20 pounds in 4 months. This plan is an attunable and realistic goal.
The bottom line: Be realistic! If you want to lose weight, set a realistic weight-loss goal that you can actually achieve.