
Create lists.
1. Go to ur homepage
2. Click on 'lists' on the top of ur screen
3. Click 'create list'
4. Fill in the name and description
5. Click 'create'
6. Click on a green button that says '+ item'. That's how you add manga.
You can create multiple lists and name them according to how you want them to be organized:
1. Toupes (friends to lovers, found family, unrequited love, zombie apocalypse, etc.)
2. Pairings, assuming they're romance (GL, BL, SL)
3. Character's personality traits (cold/calculating, funny/comedic relief, flirty, etc.)
These are just examples.

i organize them through lists, one for top tier works, one for good works, one for mid works, the ones worse than that i dont bother to put in a list ╮( ̄▽ ̄)╭
other than that i use tags for each story, typically i tag genres (ie mystery, slice of life, shoujo ai etc), common tropes (school life, hate to love, etc), and any other tags that are appropriate for the setting like time period, place, or character archetypes. sometimes for the extra dogshit ones ill tag them so ik not to read them in the future by accident.
if you dont feel like rereading all 737+ manga (which tbh i dont think anyone does), just click on each one and look through the top tags, normally u can just scrape by on using those to label ur reads.
How to organize 737+ manga? So.... I've been reading BL for 5 years, have a selection of completed/uncompleted works I've been meaning to organize to become a better recommender? I haven't read some of these in a while, idk how to organize them. How do you guys do it?