I use SelfControl App for Mac which adds the sites to your host file for a certain amount of hours. I find it to be very helpful now. Its also annoying to override it so while I could easily do it, usually it makes me delay until the "craving" passes.
Yeah, it's a good app that I have used in the past, the issue being I don't know how long I need to block everything for and I might need some of those websites randomly when I end up needing some info and the answer is on reddit etc.
Also lack of scheduling, so every time I have to click to start, I often lose so much time in the morning just browsing before I get to work etc.
