Original Link

Facebook
Facebook allows you to reconnect with old and new friends.

Digg
many will agree with this choice, while others will strongly disagree. But Digg can open you up to a whole new realm of news. You can visit the homepage once a day and instantly become up to date on what’s going on in the world.

Kiva
Kiva is a lending site that helps entrepreneurs in developing countries finance their ventures.

Lifehack.org
Lifehack can help you get things done. This blog has in depth articles on all things that do with productivity.

YouTube
If you want to work in the entertainment industry, YouTube is a great way to get your feet wet and at a very low cost.

Google
This is an obvious one.

Twitter
Twitter may someday save lives by people quickly alerting others of dangerous situations to avoid. During the California fires, people used Twitter to let friends know that they were safe.

eBay
eBay can save you a lot of money but can also bring you immense opportunities.

Ancestry.com
This website can help you piece together your family history.

Zen Habits
This blog is similar to Lifehack.org by offering simple productivity to get the most of your life.

Craigslist
This blog is similar to Lifehack.org by offering simple productivity to get the most of your life.

Post Secret
The Post Secret project shows you that we’re all very much the same. It can also show you that others may have worse problems than the ones your facing.

LinkedIn
You can use LinkedIn to network with professionals from all areas of business including Fortune 500 companies.

TED.com
This website is full of various videos from TED conferences and has biographies on some of the greatest thinkers of present time.

Wikipedia
Not everything on Wikipedia is accurate but there is so much information on almost every topic possible.

The Fastlane to Millions
This is a relatively new and small forum for those who are or aspire to be entrepreneurs and millionaires.

Second Life
This virtual world may seem like a virtual waste of time but some people such as Anshe Chung have found opportunities limitless on Second Life. Anshe has become a millionaire by buying and selling virtual real estate.

Quoteland
You can visit Quoteland and read hundreds of quotes that will give you a fresh perspective and change your life in minutes.

43 Things
43 Things can be a great way to achieve your goals. You can post your dreams and aspirations for all to see. Having that type of pressure can be very positive for you, helping you continue till you reach your goals.

Stumble Upon
Stumble Upon can change your life and help you discover so many new websites you would never be able to otherwise.