Halogen’s got some cool stuff going on we want you to know about.

• First, we’re running a sweepstakes. It’s simple; tell your local cable provider you want them to offer Halogen, and we’ll send two of you a T-shirt each day. Just fill out this quick form and the swag could be yours.

• Next, we’re wanting to hear your stories. We know there are thousands of you who are making a difference every day. We want to know what you – or someone you know – are doing. Check out this submission form here and look for your story on our blog.

• We’re also giving away a copy of Gary Vaynerchuk’s The Thank You Economy. Just leave a comment on the post and we’ll pick a winner Friday night!

• Finally, we’re looking for an editorial intern! If you’re interested in compiling information like the one you see in this post (and you’re a student), contact us about earning school credit – and some mad experience!

Here are some other great links we’ve compiled for you today. Did we miss something? Let us know in the comments:

• Heard of GoodGuide? Find healthy, green, ethical products according to scientific ratings. Don’t be fooled by false advertising. Latest on their blog: tea ratings.

• Sheen enough? Coder Greg Leuch and the people at fffff.at have created a “Tinted Sheen” – available for both Firefox and Chrome. Any mention of Charlie Sheen on any website you visit will be blocked by a dark bar, leaving you free to peruse the rest of the page in peace. (@GOOD)

• Collaborative consumption, (or the sharing economy) is changing the way we work, play and interact. Here’s an overview and collection of resources. You’ll want to bookmark this one.  (Shareable.net)

• We love this. When @FlyonaDime went to a taping of the @Oprah post-Oscars show, she rocked a head to toe thrifted outfit. (@GoodwillNyNj, @SalvationArmyUS)

• EcoStiletto salutes EcoHeroes of Sustainable Design with this interview with Jessica Helgerson (@imKaleena, @ecostilettor)

• The U.S. wastes 40% of its food produced each year and how we stop that is the subject of a new book by Jonathan Bloom. @GOODFoodHQ highlights simple things from the book we all can do to break the cycle.

• A good reason to watch TV: The cable industry added 1.8M jobs and about $250B to the U.S. economy in 2010 (@SmartBrief)

• In honor of International Women’s Day yesterday, the International Rescue Committee launched WAKE UP – an interactive multimedia site that aims to build an online community about improving the lives of women and girls around the world.

• Giving up something for Lent? Try all beverages but water, then donate what you would have spent to a clean water org, like @bloodwater. Their #40Days of Water campaign begins today. You can register online and create your page to track drinks, share & much more.

• See an amazing slideshow from the New York Times of Modernist Cuisine: The Art and Science of Cooking, the self-published six-volume masterwork from a team led by Nathan Myhrvold, a multimillionaire tech visionary. (@katekiefer, @designsponge)

• The miracle of vaccines, explained through what else … animation! (@ONECampaign)

• Stuck in a cubicle and wish you had something else to look at besides a computer screen? Check out Mashable’s guide to gardening behind your desk. Seriously!