Usually I like to just remember the names of the artists, or use Re621 to follow my favorite artists, but every (fucking) time I enter e621 I find a thousand new artists and I can't stop scrolling, it's an endless cycle: I find an interesting image, I enter the artist's page, I spend a while checking their profile and seeing the images I like, repeat.
I don't consider it unhealthy because I don't really do it very often, BUT EVERY TIME I do it I can last a couple of hours in this endless cycle.
I still use FA, I just go through my followed artists for new art, and if I don't find anything that good I fall back to my favourites. Sometimes search keywords of things I like, but quality varies drastically lol
I self host szurubooru on a pi and upload everything again there. Then I use a python script to attempt to sync e621 tags to organise it all, though some manual tagging is required when dealing with non-e6 images.
This system is not perfect but because it uses the name of the image that e621 has created, it's trivial to check for duplicates unless the image source is from outside of e6 of which there are a few.
If I'm browsing e6 and I find an interesting artist, I just make a bookmark and come back later to scrape everything I like.
It's organized I swear! Sorta.. But really I just sorta do a separate dir for each artist or tags I really like. It's kinda a mess though and impossible to find stuff easily sometimes. I really gotta figure out a better system someday.