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.
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.
Most recently Callsheet for iOS. Basically IMDB but without the awful user experience.
Biggest downside is the TMDB which backs it doesn’t seem as fully populated.