Have you tried Google Hot Trends? Get the hottest searches flashed in front of your eyes. You do absolutely nothing but watch as they flash on by and when you see one you like, you click on it. In the bottom left corner, you can select your region. I currently have it set at United States only, but you may want all regions. In the upper left corner you can set how many items you want to see flashing in front your face at a time (by default you see only one).