Clearly I've been living under a rock, but today I just learned about an organization called Earthwatch. If you've ever wanted to research Australia's vanishing frog population or go on an archaeological dig in Peru, YOU CAN. (For a fee. And you'd have to work. Apparently rather hard.)
They organize expeditions all over the world in a wide variety of topics and for (an average of) $2,000 you can go for a week or so and help to save animals/habitat/the world in general.
That, my friends, sounds pretty freakin' awesome. I'm all for sitting in a deck chair sipping margaritas by the beach, but putting a little sweat in to help save the world instead sounds awfully appealing, especially with all that's going on in this world of ours these days.