There are many good causes out there but here's one I'm prepared to get behind: Save the Words.
The site is brought to us by the fine folk at Oxford Dictionaries and you can sign up in seconds and then you are able to adopt a word of your choosing.
Oh yeah, what does it mean? Mutual kindness and care, especially of a child for his parent. It's one of the virtues I'd like to inculcate in my offspring ... completely out of self-interest, of course. And I've pledged to use it in my writing and conversation as much as possible. Go on and adopt a word yourself. You know you want to.