LeechBlock

[Scriblerus the Philosophe]

Really useful if you tend to fritter time away uselessly online.

https://addons.mozilla.org/en-US/firefox/addon/4476

You can add the page to the list and block it for certain times (ie, mine is everyday, from midnight to 5pm) and there's even a way that will let you unblock it for (x) amount of time every hour or every few hours.

[Sibling Zono (anon1mat0)]

Useful, but on the risk of blocking the monastery... 

[Aggie]

Perfect!  I could really use the X minutes per every few hours feature to allow a quick check (yes the Monastery, Google News and Google Finance ).  When I'm bored it becomes a quick check every 5 minutes - distracting, especially with the Monastery & the news.  Stocks only need a 30-second look for big movers, and I'm not playing these days much anyways.

[Scriblerus the Philosophe]

Useful, but on the risk of blocking the monastery... 

Dude, it's on my list of blocked sites until five pm everyday.