The holiday season is in full swing, and that means it's time to share some of the comfort we enjoy year round with those who are a little less fortunate — and just to be nicer to people in general. This year, Yahoo is kicking off a drive called You In? , where it invites users worldwide to share their "purple acts of kindness" (purple has long been Yahoo's official color). Here's how Yahoo describes the campaign: "Help us create a ripple of good around the world with purple acts of kindness. Update your status to share what you're doing to spread holiday joy, then inspire others to join you by asking, "You in?" Yahoo! will also be doing our own purple acts of kindness inspired by your updates. So whether you pay for someone's groceries or drop off a coat for the homeless, you'll be encouraging people around the world to join in acts of kindness."