I use a note taking model called IDA (issues, decisions & actions), I have to be very careful with issues. The Bishop wants no names in any document that is emailed out unless it pertains to a generic task (i.e. Brother x talk to Sister x about music).
Decisions are easy.
Actions are the most important because if there isn't anything actionable coming out of the meeting there's little purpose.
I also put together the agendas. One of the first items is to review actions from the previous meeting. I use our printer/copier duplex ability to put the notes of the previous meeting on the back of the agenda. Any actions that I note at the end of the previous meeting get reviewed at the beginning of the next meeting. Bishopric members or others in PEC or Ward Council have a chance to report on the assigned action and if there is nothing to report but it still needs to be done, it carries over to the next meeting. New notes are made with new actions and the cycle continues.
If I'm asked to take down a list of individuals needing special help or need to prepare for the Temple or something specific that the Bishop wants to review from time to time, I keep the list on my iPad and simply put on the next agenda that we review that list.