The following suggestion have been practised by me at some or the other stage in my life and found to be very useful. So I am listing them here.
Hot water helps to clean your stomach. Take a cup of hot water either soon after brushing your teeth in the morning or at the time of going to bed in the night.
Drinking water in the morning as soon as brushing the teeth is so helpful in preventing acidity developing in the stomach and keeps it fit for the whole day.
Omam and Jeera, half a spoon of each in warm water, taken sip by sip cures from indigestion and stomach upset.
Take half spoon of dry ginger, a pinch of turmeric, half a spoon of palm candy, a pinch of pepper powder and either jaggery or sugar, small quantity in 150 ml water. Let this boil for about 3 minutes. Drink this concoction slowly. This will cure cold and sore throat.