Wait, that title doesn't sound right. Let me explain. I think the best thing about social networks is that you can actually use them to engineer social change.
If you have a Twitter account, you can help raise money for cancer charities. (That makes more sense, right?) You can even decide which charity will receive the money.
First step: Establish a Twitter account if you don't already have one.
Second step: Go to http://can.cr/poll/ and add Cancer Alliance to your Twitter feed by following their account.
This will tell the Cancer Alliance people that there's one more person in the world who wants to see the end of cancer. For every person who follows them on Twitter, they will contribute one dollar - up to a maximum of $50,000 - to the cancer charity that receives the most votes.
Which leads us to...
Third step: Cast your vote as to who should receive that money. The Susan G. Komen foundation? St. Jude's Hospital? The Leukemia/Lymphoma Society? There are several good options, or you have the choice to add your own. And there's really no wrong answer, because no matter which organization ends up getting the donation, everybody wins.
Fourth step: Share this with your own Twitter followers.
Yes, it really is that easy to make a difference in someone's life today.