Just a little insight from someone who has been IF'ing for about 14 months straight. Fasting is not a magic bullet to weight loss. It is a tool, and all tools have a learning curve. In order to us IF properly we must master it first. How do we do this: Awareness.
The first thing you realize when fasting is how hungry you become when you're not fasting. You will have urges to eat double your calories in Snicker bars. Careful you don't follow the urge. In truth, your stomach is going to fill up faster, and you will feel more satisfied at a smaller meal. That is unless the meal is liquid or sugar, or even worse liquid sugar (careful again, alcohol is not that different than liquid sugar).
You want to make sure that the first thing you eat after fasting is nutritionally complete. Think meat and potatoes, or a bowl of hearty soup plus some veggies. Make sure you eat a good amount 700-900 calories. Now, here is where awareness comes in. Wait a few minutes before dessert. Enter your calories in Livestrong, read a book, play guitar, watch a documentary etc... Now have your desert, or glass of wine. Watch your portion. Try to keep your calorie intake half of your daily average. Mine is 2400, so I try to keep it under 1200 coming off a fast. This usually equals dinner and 2 glasses of wine (6oz).
Tools are a very important role in learning about who you are and what you are doing at all times. Though I agree Lance Armstrong is kind of a douche, his site Livestrong has an app called MYPLATE. Use it to track your calories and macros (protein, fat, carbs and yes sugar). Every time you take a bite of something or a drink that isn't tea, water or black coffee, track it. Do not cut corners, don't fool yourself about portions. When in doubt overestimate, because statistically we underestimate how much we think we eat. You will quickly learn where the problem lies. There is an icon you can click that will show you your daily calorie intake in a pie chart. After tracking mine for 30 days I saw that Red Wine was taking up a quarter of my daily calories. Holy shit, am I an alcoholic (functionally maybe). 3 glasses of the Red a day (hey I'm a big guy), adds up to 450 Calories. On the weekend if you tag a couple Beers on to that were talking 800 calories. Nutritionally poor calories, and to boot, calories that wreak havoc with sleep cycles.
Awareness is taking full responsibility for our actions at all time. Do not lie to yourself, it leads down a dark path. Light the torch of awareness and you will forever know thyself.
Also use the tools. For weight loss we have Intermittent Fasting. Control your calories, and carb/sugar intake using Livestrong. Step on the scale a few times a week, and input your weight in the Livestrong app you now possess. It will make a nice graph to watch your progression. Mostly like who you are and enjoy awareness. It will free you up to get on with more important things in life!