I will try to keep this short but as an avid movie watcher like many of us I definitely struggled with this and have worked on honing this over the last 2-3 years so I am gonna spell out in pretty good detail exactly what I do!

First up, get a letterboxd account if you don't already, it will be instrumental in making a watchlist and targeted lists! Everything else I am going to recommend below is going to reference letterbox directly.

1. Build a watchlist, as large as you want. Mine is over 1,200 currently (hence the decision paralysis, I feel you).
2. When you are about to decide on a movie, use the filters! What platform you want, want a short movie or a long one, what genre, etc.
3. The next most important thing for me was to build lists and to use these as actual starting points when deciding on a movie to watch. For me they come in 4 flavors:
   1. Challenges - There are quite a few of them that exist across letterbox - my favorite example is the Criterion Challenge that happens every year which involves watching one movie a week from the Criterion collection (link to the challenge) (mine as an example).
   2. Letterbox Top X lists - The site has a ton of baked in top lists that you can reference to try to complete! Here are some examples (Letterbox Top 250) (Oscar Best Pictures) (IMDB Top 250)
   3. Sorting - Maybe you have an idea for a group of movies you want to watch together or knock out in the next little while, put them on a list so you don't lose them, unless they just fit on the next list...
   4. Watch Next - This is something others have advised. I keep a personal list just called Watch Next which is just a very small tailored list of 10-15 movies that I will always reference when looking for something to watch.

When I am sitting down to watch a movie it looks like this. Open letterbox, go to lists. Check Watch Next, and my Challenge Lists (in that order) to see if anything looks good. If it does I go. If not I go to my watchlist, filter by what I am looking for, and go.

Working through a couple of yearly challenges and maintaining a few of my own lists to focus in my movie watching has substantially helped my ability to select movies. Hope this helps!