Be careful. I do a lot of personal trainer. There are a lot of tradeoffs with each diet, and there is a lot of misinformation.
Honestly, I always tell everyone to learn the basics of the chemistry behind metabolism. Nothing fancy (3 hours of research). Understand why your body is a big glucose factory and how it converts all types of macromolecules (lipids, proteins, and so forth) into glucose or some pathway into making glucose to derive energy (ATP).
Understanding the basics helps you understand how various diets works like sugarbusers, Atkins (understanding the glycemic index is a life saver), split diets where you just look at your macro nutrient intakes (fats, sugars(sugar alcohols, dietary fibers...), and protein intake), carb-cycling, Paleo diet, and so forth. Understanding how a diet works helps you to better manage what foods exactly to chose to succeed in the diet. Furthermore, switching between diets is also very helpful, especially when you're feeling more depleted in energy and of course the other tradeoffs that need to be considered. In addition, you also have to consider if are you going to exercise. If so, research the type of exercising your going to do. If there's one thing I learned about helping others lose weight and get into a shape is that they fail because they don't understand basic dieting and how to exercise correctly. The fastest way to lose weight is a combination of dieting and exercise. Now it's true that you can look at dieting as the intake of calories vs the calories burned and if a caloric deficit exist you will lose weight. However, that's not very helpful because there are a number of pathways to follow. Don't fall into the strict calorie counting because that will lead no where.
Sugarbusters can be very unhealthy long term because depending on how strict your carbohydrate intake is can lead to a surplus of ketone bodies in the blood from high protein metabolism. In addition, your body is busy converting fats to glucose pathways, via beta oxidation, you will feel lathergic, especially if you're active. Personally, Sugarbusters should only be used for short periods of time but if it's supplemented with the Atkins diets can yield decent results.
The bottom line: don't follow anyone's advice until you've researched it. Understand that a diet shouldn't be a short goal to lose weight. This will lead to failure. A diet should be permanent eating habits. Most importantly, different methods work for different people. There's also the psychology that goes into understanding what makes eating habits very successful. For instance, giving yourself "cheat meals" once a week is very helpful in long term goals.
Good luck.
