Interviewing for several (10-50) items of what clients want (progress, details of Prefered Future, forerunners, ....), writing a list is a "tool" we learned from our colleauges in BRIEF, London.
Jesper asks his stepson about 25 good reasons, why he (Jesper) should sleep well after an incindent in the night...
Chris asks a pupil who could not bring up any interest for school but playing football to make 20 examples what he's good at since he's good in football
Kati asks a team what are 35 reasons for confidence that they will make good job even in the upcoming challenging month
And my favorit one: Chris Iveson asks a young man, who just came out from prison (where he was getting in and out almost his whole life) to mention 35 things from his latest week that's alined with the possibility that he's never getting in again. This is my favorit because of the Nr 35 item: he mentions that the previous night he went out with his brother and ordered a coffee (((yes, we mean such little things when taling about 'list'))). We know from the story since, that this 'ordering coffee' (instead of heavy alcoholic stuff) made him think, that he can make change, he can act in a new way...
So, if you want to play around with writting lists with clients, you can try it out in sense of follow up conversation with your study buddy:
mention 30 things which show for you that you are making porgress as a coach (or whatever topic your buddy wants to work on)
In this phase of a conversation we usually write for our clients, appreciate what we get usually nonverbally and go on asking 'what else'.
Btw, Chris has a nice example of list writting even for himself... (s. the film and ignore the HUN text)