Tracking devices: what’s useful?

About three months ago, I got the new Garmin Forerunner 645 after dealing with some issues for about 9 months with my old Forerunner.
The 645 is an amazing device on many levels. As a running device and fitness tracker, it measures about everything you could imagine that something simply strapped to your wrist can. It’s not perfect at everything but what it can do is pretty amazing.
That said, there have been plenty of reviews of this device. This is not about the device itself. It’s about the usefulness of all the things our watches can track these days. As I’ve stated before, all of this data can be a blessing and a curse.
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It’s again time for one of my favorite things to do. Once again, it’s time for me to invite you to ask me anything you would like!