http://bugmenot.com/ and type the URL of the website you want to log into.
Examples:-
http://www.nytimes.com/, -http://www.winnetmag.com/etcetera. Another (and better) way is changing the user agent of your browser to:
Googlebot/2.1+-http://www.googlebot.com/bot.htm .
This is very easy method in Mozilla's Firefox.
Download and install the User Agent Switcher from-
http://www.chrispederick.com/work/firefox/useragentswitcher/
and add the Googlebot user agent . Enjoy, now browsing entire forum without even needing to login to view restricted areas, and it works on other sites .