Another key to losing weight quickly is to consume simple whole foods. These foods tend to be filling and make it easier to consume lesser calories without making you feel too hungry. So, during the entire week, stick to single ingredient whole foods to help you lose weight quickly. And stay away from foods that are processed or packaged. Remember, lean proteins and low-carb veggies are your go-to foods during the diet.
Have a small, protein-heavy breakfast. Kickstart your day with a protein filled breakfast that will give you energy (and keep your blood sugar up) for the rest of the day. Aim for a breakfast that is 400 calories and eat it every morning at around the same time. Go for variety and rotate two to three options. Pair your breakfast with unsweetened tea or a glass of water with lemon.[6] 

Stay away from the wrong kind of fat- Fats have unduly got a lot of flak in the recent past. But recently,the importance of good fats has gained prominence. Eat good fats like coconut oil, MCT oil, ghee and so on. Fats help in transporting fat-soluble vitamins A, D, E and K through the bloodstream to where they are needed.  They also raise good HDL cholesterol, lower bad LDL cholesterol, and protect against the buildup of plaque in your arteries. What’s more? They help prevent belly fat, according to research. Include good fats and definitely eliminate bad fats like vegetable oils, soybean oil and so on.
You probably feel this way because if you cut junk food out completely and suddenly, your body is shocked by the sudden change. Also, junk food has a lot of sugar, which can make you feel energetic, so when you cut junk food out right away your body isn't used to not getting the sugar you used to consume. My advice is to take baby steps. Cut out candy/ice cream, then chips, then soda. etc. until you are consuming less or none at all.
And maybe a new mattress, because it’s not just the amount of time you spend sleeping that keeps you lean, it’s also the quality of your sleep. Fat cells in your body produce a hormone called leptin that helps the body keep track of how much potential energy (i.e. fat) it has stored. But leptin is only produced during certain stages of sleep. Miss out on those stages because you’re not resting soundly enough, and you’ll disturb levels of the hormone, leaving your body with no real idea of its energy reserves. Consequently, you’ll end up storing calories rather than burning them.
And maybe a new mattress, because it’s not just the amount of time you spend sleeping that keeps you lean, it’s also the quality of your sleep. Fat cells in your body produce a hormone called leptin that helps the body keep track of how much potential energy (i.e. fat) it has stored. But leptin is only produced during certain stages of sleep. Miss out on those stages because you’re not resting soundly enough, and you’ll disturb levels of the hormone, leaving your body with no real idea of its energy reserves. Consequently, you’ll end up storing calories rather than burning them. 
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