Smoke scrying is best done while relaxing in front of a campfire. You should be in comfortable visual range of watching the smoke rise.
Do not follow the smoke up but rather allow the smoke to forms patterns within your spiritual gaze. In time you will see visions of many far off events.
I have generally found people who have natural artistic skill good at this form of scrying.
The American Indians practise a special type of smoke scrying. It’s called a sweat lodge.
Water is poured over hot rocks in a tent to create steam. The steam is inhaled by those who sit naked around the rocks. The combination of temperature, humidity and elevated levels of carbon dioxide produce a state in which visions can arise. This form of scrying may be dangerous and should only be undertaken by experienced people.