Want to slim down fast for that beach vacation or high school reunion? While there are many things you can do to shed pounds, losing weight too quickly, like any sudden change to your body, can be dangerous. While fad diets, diet pills, and fasting may indeed induce rapid weight loss, these methods can cause you to lose muscle and may also injure your heart and other organs fairly quickly. The best solution? Don't go for an overnight miracle. Instead, follow these steps to lose fat rapidly, healthily, and sustainably. Steps 1.Determine your daily calorie intake . Losing weight is simply a matter of expending more calories than you take in, through exercise and your daily activities. To win the battle, it helps to know how many calories you are consuming in a day.

• Write down all the things you eat on a typical day. Carry a small notebook with you and write down every snack, every drink, and the contents of every meal. There are also great websites that you can use to keep track of calories, get recipes, and help achieve your goal. Don't forget to include the pats of butter or the spoonful of sugar in your coffee. It's best to do this for at least a couple weekdays and a weekend; it's even better if you can go a full week. There are also calorie tracking websites that can help you to do this

• Do an itemized calorie count. When possible, write down the number of calories in each thing you eat as you eat it. Keep in mind that the recommended serving size is often considerably smaller than the serving you actually eat. Look up the calorie count on the internet for foods that don't have calories listed on the container or for fast food meals. You don't have to be 100% accurate, but you do want a good estimate of the number of calories you're taking in. There is an idea that multiplying your own weight by ten will produce a rough estimate of the number of calories you need to eat per day to maintain your weight. This is NOT true, you may wind up grossly under (or perhaps over) estimating the number of calories you should be eating. Use a scientific or health website to determine the number of calories you should eat a day or consult your doctor. Everyone has different metabolisms and there is no blanket rule that covers everyone's recommended calorie intake. Reducing 500 calories per day from the calories you eat to maintain your weight can help you lose a pound of fat per week

2. Go over the list and decide which foods to cut out or reduce. Cutting calories is usually a lot easier than you might think. For example, that daily tall latte in the morning may pack 500 calories. Since a pound of flab (lost or gained) is roughly equivalent to 3,500 calories, replacing that rich beverage with black coffee can help you lose a pound a week. Other easy cuts include salad dressing (salad dressing is the number one source of fat in the average American woman's diet) soda pop, candy, and butter. Look at the nutritional information for the foods you eat, pay special attention to your intake of saturated fats and empty calories (high-sugar foods). You don't need to cut these things out entirely, but if you reduce your intake of high-fat, high-calorie foods you'll lose weight faster.

3.Seek out alternatives to the unhealthy foods you've identified. You can simply reduce the amount of soda you drink or mayonnaise you put on your sandwiches, or you can substitute healthier choices. Drink water instead of soda, for example, or use mustard instead of mayo. Low-fat and low-calorie options are also available for most foods, and many of these are natural, (although some are made with strange chemicals), and tasty. Start trying to eat healthy in most meals:

• Choose lean meats. Chicken and fish are both very low in fat (and certain fish like salmon, sardines, and fresh tuna are an excellent source of antioxidants, which are also beneficial to your health), so aim to replace some or all of the beef or pork in your diet with these foods.
• Replace high-calorie side dishes with healthier alternatives. Many people get a ton of calories from side dishes such as macaroni and cheese, French fries, or potato salad. You can eat healthier and lose weight by replacing these with fresh vegetables and salads. Pre-made salads are practically effortless, and when accompanied by a reduced-calorie dressing or no dressing at all, they're weight-loss gold.
• Start your days off right. A fattening breakfast of bacon and eggs or a pastry can be replaced with yogurt, oatmeal, high-fiber, low-sugar cereals; or fresh fruit for fruit smoothies. However, for those on a low carb diet bacon and eggs are a great combo for breakfast, since neither have carbs. But don't fall into the trap of skipping breakfast. Eating a healthy breakfast increases your rest metabolic rate earlier in the day, and reduces snacking before lunch.