I take a snapshot of the system view, with the Earth-like info displayed. I'm on a tript hat will be over 150K Ly total, so I have quite a few now - but as mentioned, don't say it out loud until you've turned it i9n, just in case someone nearby snipes it from you.
Z...
Use this:
https://forums.frontier.co.uk/showthread.php?t=138155&highlight=eddiscovery2
Very good - logs systems as you enter them. You can make notes in the right hand side box and click in the note tab next to the system name to enter it. You can also copy and paste it out into an Excel spreadsheet if you're that way inclined.
I take a snapshot of the system view, with the Earth-like info displayed.