Hi..... Have six meals in a day – three big meals and three small. Breakfast, lunch, and dinner should be heavy and calorie-rich. A heavy dinner adds weight to your body as your metabolism is not as active when you sleep as compared to when you are awake.... Eat - Eggs, lean meat, fish, pulses, sprouts, and dairy products that rich sources of proteins. Fish such as tuna and mackerel are rich in oil and are one of the best ways to increase weight.....