Even though the Apple Watch is pretty easy to navigate, it still takes a little while to set it up just the way you want it. Furthermore, you won't be able to find the Health & Activity data that the wearable collects anywhere else, so if you lose it, you will never be able to get it back. In case you're worried about such things, there's a pretty simple solution: make sure you have a back up so that you can easily retrieve all your files and settings at any given time.
If you aren't really a tech-savvy person and you don't know that much about the inner workings of your Apple Watch, don't worry too much: Apple has you covered on this one. Since it's more of an iPhone accessory then anything else, the watch automatically creates backups of itself on the phone at regular intervals. Here's what gets automatically saved on your iPhone: Home screen layout, clock face settings, dock settings, general system settings, app-specific data and settings, synced playlists, synced photo albums, notification settings, time zone settings and Health & Fitness data. In case you want to switch from an older Apple Watch to a newer one and you need to trigger a manual backup, the only way that it can be done is by unpairing the two devices. However, when you do this, all the data on the Apple Watch will get purged, so you may not want to trigger a manual backup just for kicks.
If you're the kind of person who needs a backup plan for their backup plan, all you need to do is create a backup of your iPhone on your Mac or PC via iTunes or on the cloud via iTunes and all the data from your Apple Watch will be saved as well. The tricky part is the one related to Health & Activity as that data only gets copied when you make encrypted backup. If you choose the unencrypted version, the Health & Activity files will be automatically skipped. You should also know that for security reasons, the backups will never include the details of the cards that you use for Apple Pay, your Bluetooth pairings and the passcode for the watch. This means that you will need to set those up manually in case you get a new watch or you wipe the old one.
As far as restoring data from a saved backup goes, it's actually just as easy as everything else so far. If the iPhone detects that you're trying to pair a new Apple Watch or one that has been recently wiped, it will give you two options: Set Up as New Apple Watch or Restore from Backup. Choose to restore from backup option and all your previous data and settings will be automatically copied into your Apple Watch.
Now that you've learned everything that you needed to know about backing up your Apple Watch, you may also want to read some of our other interesting articles such as: "Top 5 apps to help you send secret messages on iOS" or "What to do when the browser on your iOS device gets hijacked".