Delete the reddit app and logout. Have a really long password so you're too lazy to type it in. That's my trick. Used to spend hours and hours on reddit... now I'm just stuck on HN :(
That's what I did a while ago and haven't wanted to look for it again - the app was always terrible anyway. On my desktop/laptop, I now log out more as well to not have the orange notification show up if I 'accidentally' browse to the front page.
For Twitter (which I think is more 'addictive' due to the greater pool of talent about compared to hivemind posts), I need to open up my password manager and it's quite a process to log in again compared to a saved browser password (especially with two factor authentication) - quite often that hurdle is enough to have me reconsider idling away.
By the way, did you know the Twitter app requires about 5 taps or strokes before you can log out? They really try to hide that one from users.
For Twitter (which I think is more 'addictive' due to the greater pool of talent about compared to hivemind posts), I need to open up my password manager and it's quite a process to log in again compared to a saved browser password (especially with two factor authentication) - quite often that hurdle is enough to have me reconsider idling away.
By the way, did you know the Twitter app requires about 5 taps or strokes before you can log out? They really try to hide that one from users.