One of the most effective ways is by observing and recording important information. Observation log.
So from now on I will try to observe other people behavior.
How they think. Why they think that way.
The best way to acquire tacit knowledge is by asking very detailed questions.
It is not the same to describe generally than it is to ask in detail.
First identify the ability you want to acquire. Then go to the expert and ask him very detailed questions about the process he performs.
It is important to focus first on the basics.
What are the basics of certain operation.
I had already tought about this, first identify what the strongest skill of a person is, then ask him or her in detail about it.
It is also a good way to show empathy, and a way to stop focusing just on yourself.