Here's what I'm doing: Watching the seasons backwards. I just finished Season 7, and have started Season 6.
Doing this for a couple of reasons. I've never seen many of the later episodes (they didn't rerun those very much here, where I live.) And since I already know the earlier seasons...
Another review, including video of the box set itself. Note the confusion about audio tracks on this release.
https://bluray.highdefdigest.com/87917/missionimpossibletheoriginaltvseries.html