This tool could be helpful if you are on OS X: http://visitsteve.com/work/selfcontrol/ http://visitsteve.com/work/selfcontrol/ Page also contains links to othe

This tool could be helpful if you are on OS X: http://visitsteve.com/work/selfcontrol/ http://visitsteve.com/work/selfcontrol/ Page also contains links to other useful apps. I really like Spirited Away. After rereading the post, maybe not applicable if the sites are crucial to get work done.