At the end of your beam time, you need to do a summary. The usual content for a summary is the plan for the time, what was actually achieved, what problems were encountered and what work should continue next time.
You should also document work that you did in the tunnel after a PAMM or user access.
It is very much appreciated if all shifts are well documented with entries throughout explaining what you are doing and what is happening with the machine. The elog is the primary source of communication and it saves people from having to phone you to work out what you are doing and whether there are any problems.