Following result is obtained by our Internet Research Algorithm: You should follow given steps to gin weight in healthy way – 1. Calculate how much weight you want to gain - Before starting a new diet to help you gain weight, find out how much weight you want or need to gain. 2. Count calories - Monitoring and counting calories is not just for weight loss. 3. Purchase a food journal - Food journals are very helpful for those who are interested in gaining weight. 4. Eat more meals and snacks - Many people eat 3 meals a day plus a snack or two. If you're trying to gain weight, it is important to eat more food, more frequently. 5. Eat healthy foods that are calorie-dense - When you're trying to gain weight it's important to maximize the number of calories. 6. Add extra calories to meals and recipes - In addition to eating more calorie dense foods. 7. Drink your calories - Drinking extra calories is another great way to slowly gain weight. 8. Eat your favorite foods - It may be hard to gain weight, especially if you don't have an appetite or are recovering from an eating disorder. 9. Avoid unhealthy sources of fat.