It can be tremendously frustrating to try and lose weight quickly. Not only is it difficult to overcome your body's innate desire for food, appetite and decreased metabolism, but also your own impulses as well. This is such a problem that few people are ever able to achieve long term weight loss success. It's important to know what kind of mistakes are common when you try to lose weight, and to overcome them yourself. Doing so gives you the best hope for real, long term results.
There are three major mistakes that everyone seems to commit at one time or another. Though they vary by what kind of diet you're doing, they're ever present and need to be watched out for:
1) Quitting too early
2) Expecting success overnight
3) Having the wrong type of attitude

When I say wrong type of attitude I mean one that expects quick results without any work. All weight loss methods require some sacrifice, but people need to choose one that closely matches up with what they're willing to do. Don't expect miracles to occur overnight, and select something that you know you can actually sustain. If you commit to an exercise plan, don't go all "Rocky" on the first day and expect to stick with it. There will be days where this isn't possible due to time constraints or energy problems. However, if you create a plan that's manageable, and stick to it, you're much more likely to succeed.
If you break your exercise or diet plan, don't just toss all your hardwork down the drain. You aren't a failure and this isn't the end of the world. Particularly if you're on something like HCG or another proven method like garcinia or green coffee extracts, your body will pick right back up where you left off. Rationalize your cheating, see it for what it is, and move on.
Expecting Major Life Changes Quickly
One of the biggest problems we hear from people is that they had huge expectations and they didn't materialize like they expected. Particularly with highly effective treatments such as HCG, even if you achieve huge results on the first day, this is abnormal and you shouldn't expect this forever. You always want to manage your expectations and make sure they're reasonable. Sure, 1 pound a day of weight loss would be fantastic, but maybe your body is only capable of 0.5 lbs per day or so. This is important to keep in mind, and it doesn't mean the method won't work for you. Realize that losing weight at your own personal pace is the best you can do (sure some things help you along with that, and that's great).
Don't check the scale every single day expecting to see miracles, this can only discourage you. Stick to your plan and check the scale once or twice a week to see your progress. This is much better and much more likely to cause you to feel excited and motivated. Focus on your diet, the supplements and your exercise. Make this a life decision and make it permanent.
Training for the Wrong Reasons
Many people go on "crash diets" to reach some finite and immediate goal. For example, "I need to lose weight for a wedding!". This is a sure way to fail in both your long-term goals and also your short term ones. You need to have a real plan, one that you will stick to permanently. You need to develop a sustainable diet that isn't denying yourself the things you love to eat most. You also need to add in exercise, even if it's only 10 to 15 minutes per day, every single day. This is one of the best ways to stick to a program and succeed.
You are making these changes for yourself, not for anyone else, and you need to remember that. No one else is going to benefit the way you benefit from this, so doing it to impress others is the wrong reason. You need to do it to feel better about yourself, because you definitely will by the end of your effort.