I was sitting at around 12% bodyfat, and had reached a plateau. I wanted to get below ten, and It just wasn't happening no matter what I did. I discovered the Anabolic diet, which is a carb cycling diet, sometimes called a cyclical ketogenic diet (CKD). Basically you eat high fat, high protein on monday-friday, and eat high carb, low fat on saturday and sunday. The absence of carbs forces your body to burn fat for energy, and it worked great for me. It is also fantastic for putting on muscle. It is used mostly by bodybuilders, due to the ease of gaining muscle while on the diet, and the ability to cut without losing much muscle. The Anabolic Diet: More Muscles, More Strength, Less Fat | StrongLifts.com CK/Anabolic Diet mega thread
The first link gives you a basic idea of CKD and how it works.
The second is a discussion/question thread at Anabolicminds.com (great site). You might have to create an account, but it is well worth it. The Metabolic Diet - Anabolic Solution
If you want to read about it directly from the author (Mauro DiPasquale) you can go here, enter your email and get a free abridged ebook version of his original book, The Anabolic Solution for Bodybuilders.