Let's say your IPO just came in—or maybe you uncovered a cache of extra cash to spend on yourself and your four-legged partner. If you hike or hunt, we know you're already craving the Garmin Astro, a tracking receiver and transmitter set that uses GPS technology to map your dog's movements. And if you're into photography, it's hard to resist the possibilities presented by a GoPro Hero 3 camera. The product is used primarily as a headcam, but lately it's making waves as a tool for seeing the world from a dog's point of view. Put it on your head one day and your dog's the next to gain some stunning insight into human-canine relations.