Year end procedures are a big trouble for the Moodle administrators to archive your current courses, retain students work and create your new courses for the start of term.
Here is very useful youtube video by Lewis Carr teaching how to create and automate your end of year rollover strategy and procedures using core Moodle and a few simple CSV files.
Video is embedded below and here is the direct link on youtube.
The video also uses some slides which are embedded below:
If you have some more creative strategies for year end procedures, please share in the comments.