Install a plugin that blocks all your problem sites. I'm using "Impulse Blocker" on Firefox and it's helpful to break the habit. You can easily turn it off and waste time on HN if you want to... you just need to do it intentionally. Just having that one extra barrier is enough for me to avoid almost all consumptive media during my work day (still read too much before and after work but that's my choice)
Plugins are too easy for me to disable. Somehow editing /etc/localhost and redirecting time wasters to locahost requires higher activation energy for me and works so that's what I do.
