Although really, everyday should be backup day. Here, I made a list:

The Minimal to Backup

– password manager file (you have one right)
– contacts
– calendar
– bookmarks

Things to remember:

– always backup twice – here

– do big backups in chunks  – here

– if you’re using the cloud, here’s what your data looks like this

– and if everything goes west, data can still be recovered from this