I am terrible at it too, but slowly getting better. I have recently set up restic to automatically run daily backups from a digital ocean droplet where I'm hosting my website to my home NAS. It's a great tool, it can encrypt data, send it to a remote location and it does incremental backups so it doesn't take up that much space.

Long term, my plan is to do a similar setup to back up important data to a cloud (probably a separate digital ocean server). Of course, I won't be backing up my Linux distros, only the important stuff like documents, photos, personal projects.

I'm also considering using blu-ray discs. They are convenient, can store large amounts of data (well... for me 25GB is a lot), are offline physical discs that don't degrade that easily if properly stored. Also, once burned they are read only which is great for backups.