To increase digestive fire and stay in balance, consume warm liquids and add heating spices such as ginger and a dash of cayenne to create a spice water to sip all day long. (fivepillarsyoga.com)
On a more subtle level, the abdominal lock strengthens digestive fire. (sonima.com)
This can take some practice, but it is No. 1 in preserving a strong digestive fire. (mindbodygreen.com)