Many years ago I was recommended by my Kungfu brother, Sifu Kai, a high level martial artist and internal medicine practitioner, to take warm water as the first drink of the day. It has become something of a ritual.
The warm water helps stimulate your digestive system first, before any tastes excite the system. It is simple and virtually free. The only real cost being warming the water in a kettle.
This simple change to my daily routine has worked wonders.