contents of /etc/hosts, ready to :w right after I submit this:
127.0.0.1 news.ycombinator.com 127.0.0.1 reddit.com 127.0.0.1 www.reddit.com 127.0.0.1 techmeme.com 127.0.0.1 www.techmeme.com 127.0.0.1 slashdot.org 127.0.0.1 www.slashdot.org 127.0.0.1 theregister.co.uk 127.0.0.1 www.theregister.co.uk 127.0.0.1 news.bbc.co.uk
of course, undoing it is trivial as well, but seeing 'unable to connect' will hopefully take me off auto-pilot and remind me there are better ways to spend my time. See you around YC