This is one of those irritating articles that has slides instead of pages. Go for it.
Everything you want to know about Apple WatchOS 8
(1) Change the iMessage responses to what you actually want to say: https://appleinsider.com/articles/21/08/29/how-to-customize-your-apple-watch-default-message-responses
(2) Calibrate the Activity app to how you move: 9to5mac.com/2021/08/26/fix-apple-watch-workout-tracking-activity-tracking/
(3) Extending the life of your Apple Watch battery: 9to5mac.com/2021/08/02/extend-apple-watch-battery-life/
(4) Control music on your Mac from your Apple Watch: appleinsider.com/articles/21/06/02/how-to-use-apple-watch-to-control-music-on-your-mac?
(5) Smart scales that’ll sync with your Apple Watch: 9to5mac.com/2021/05/15/sync-weight-iphone/
(6) How to set your Apple Watch a few minutes fast: appleinsider.com/articles/21/02/13/how-to-set-your-apple-watch-to-run-a-few-minutes-fast
(7) Toning down your Apple Watch if it tells you too much: 9to5mac.com/2021/04/13/managing-apple-watch-notifications/
(8) Seven Apple Watch settings you should change right away: http://www.cnet.com/how-to/7-apple-watch-settings-you-should-change-right-away/