1. Increase calorie intake

Increasing your daily calorie intake by 500-1000 will help you gain about one pound a week. Eating more complex carbohydrates such as whole grains, pasta and brown rice in bigger portions will speed up the process.

2. Eat more frequently

In addition to the three main meals, have two to three snacks. Snacks of high-calorie value like banana and milkshakes will boost the process even more. Also, keep in mind to perfectly time your meals.

3. Never skip breakfast

Eating breakfast is one of the most detrimental factors when it comes to fitness, and one should never skip it. A healthy breakfast is a key to a healthy body. Having high protein food such as eggs, milk and seeds is also recommended.

4. Do not replace carbohydrates with proteins

Even though it is strongly recommended to eat protein-rich food, never substitute them for carbs. Most of the weight gain comes from carbohydrates, so proteins should be added to the meals and by no means should they replace carbohydrates.

5. Eat the right kind of fats

Consuming a moderate amount of unsaturated fats and avoiding trans fats will help keep a check on your fitness. Add avocados, peanut butter, olive oil, canola oil, seeds and nuts to your diet.

6. Avoid drinking water before meals

Consuming too much amount of water before eating will make you feel full, and you will end up consuming fewer calories.

7. Workout to increase strength

Weight training helps to convert fats into muscles, thus adding some extra pounds to your body and helping you get curvier. Add compound movements such as body-squats, push-ups, and deadlifts to your workout list. Do not engage in any kind of aerobic exercises and try lifting as much weight as you can.

8. Maintain a journal

Keep a track of your weight-gain progress by keeping a journal. Maintain a record of daily calorie intake and check your weight every week for any kind of progress. It will motivate you for further progress.