Backups are important! It's usually recommended that you have at least one backup that is frequent, as well as one that is off-site, and it's recommended that you test them occasionally to make sure they are working as intended! What kind of computer backup solutions do you use, and how often do you make sure it's backed up?
I have a wireless Time Machine backup set up on a secondary Mac in my house, and my main MacBook Air is backed up wirelessly to it every time it charges when I'm at home. I left my old computer's backup (from when I got this current one) drive at my mom's house a few years ago, and recently I got another drive I plan to regularly update when I bring my Mac to my dad's house. I also have a lot of my older computers backing up to the wireless Time Machine at home, but those are usually less mission-critical compared to my main Mac with all the photos, music, files, website backups, etc. on it.
