A pretty much guaranteed method: Get the book and read it. Start the program, however works best for you. Listen to your body's hunger signals, and only eat until you're full, not stuffed.
You need to make a conscious decision that your health and your weight is a priority for you. Until you look up from your desk and do that, you are not likely to be successful. Sorry to be so blunt, but your post does not indicate to me that you're at that mental place yet.
SLD is as close to magic as you get with weight loss, but it is a tool, not a magic wand. You still have to make the right eating decisions. But the SLD calories, whether oil or sugar, or nose-clipped calories, change the "settings" in your brain, allowing your body to release extra fat easily.