I’ll start.
Two weeks ago I started using Trakt. It’s a website/app designed to keep track of shows and movies you’ve watched, and gives you a list of which episode is available to watch next which updates as new episodes are released.
A lot of other similar websites I tried don’t have everything cataloged (some done have anime, while sites like Letterboxd only do movies).
Recommendations function is pretty horrible though and they lock basic filtering functionality behind a subscription, but it’s still pretty good for what I need it for.
It also gives you stats for your total watch time. Which is now 192 days… Not including reruns… So maybe it’s double that. I don’t know whether to be disappointed in myself or proud.
iNaturalist is a similar non-profit run app and identifies all living things: trees, flowers, bugs, birds etc.