Get started with Apple Watch
Get these Apple WatchOS Apps
1Password: For quick access to logins and passwords. Especially useful for things like WiFi networks and credit cards.
Cardiogram for Apple Watch: Monitor your hear rate stats with this app.
Complicate It: Create custom watch faces/complications. I have not dabbled much in this yet so more on this later.
Day One Journal: Create quick journal entries on your watch. Even use your nose as an 11th finger.
Drafts 5: Capture ‣‣ Act: Easily one of the most useful iOS/WatchOS apps to date with the ability quickly scribble and dictate your thoughts into text notes that you can access on your iPhone for later use.
Grocery: Quickly add items to your grocery list by telling Siri to do that for you.
Shazam: Yo what song was that? Pull up this app on your watch and tap for it listen for a few and it will more often than not give you a quick and accurate answer that will also sync to your iPhone for later reference.
Visual Codes: You can create QR codes on your iPhone that you can have show up on your Apple Watch that you can then launch and point an iPhone camera to if and when you or someone else needs to access say a WiFi network, a geo location or a website. More detailed instructions later.