Found a Great post on mashable.com on how to actually do good on Twitter.
Twitter is good for a great many things, from sharing music to building your brand, from finding friends to playing games. There are many ways to help out others just by tweeting.
1. Follow Charities:
Charities use Twitter to spread information about their causes and campaigns, and you can stay connected to those issues by following them. For non-profit organizations, Twitter is an amazing way to reach constituents and you can help them extend their reach by retweeting the things that they tweet out to your network.
2. Participate in Twitter Fund Drives:
Twitter has proven to be an incredible way to raise money. Because information has the potential to spread so quickly, news of a fundraising drive can reach millions of people through retweets in a relatively short amount of time. As a result, Twitter becomes a great vehicle for encouraging people to donate to a cause, and a number of highly successful fundraising events have been held over Twitter.
3. Help Someone Find a Job:
Twitter is a great way to find a job.If you know of a job that fits their need, tweet it out to them.
4. Start or Sign a Petition:
One of the best ways to organize and raise awareness about an issue, is to start and sign a petition. Twitter has made it absolutely dead simple to create and spread petitions by combining both the means of signing and the means of spreading the word into the same action: the retweet.
5.Organize a Tweetup:
A tweetup is an offline meeting organized via Twitter, and they’re an incredible way to gather like-minded people and raise awareness for a cause, issue, or charitable organization. By bringing people together offline, you can make the issue at hand more real and get people more actively involved