I also planned on making a list and I did write some stuff down, but I didn't use any of it. Usually I just started with the most concerning happening that came to mind and the conversation just naturally went on from there. When the conversation came to a stop, I found another thing and it went on from there as if it were the beginning of a session.

You should realize that the problems you think you need to address there are probably not the ones that you will be addressing. If you are like me, these problems are just the reaction of some deeper feelings and the way you subconsciously function. I don't know what is your diagnosis so I may be wrong.