Welcome Tile... a little block you attach to anything, that connects to the Internets, which tell you exactly where it is and can even make noises to help you out.
they're $19. To be honest, I don't have that in my budget... but when you think about it.. it could be saving you WAY more than that. I lose my phone and camera and debit card at least every other month.
This isn't an advertisement [although I wish it was cuz that would mean I'd have one of these things], but I feel like I'm gonna need to find a way to get at least a few of these. You probably should too.