Stash Cash in the Door? - 15 Secret Hiding Places That Will Fool Even the Smartest Burglar. you know until you put it all over the Internet and then everyone and their mother knows you have secret hiding places.
Cover your trampoline springs with pool noodles. I was pinched in springs so often when I was a kid. This is safe and looks awesome. Now I just need a house with a garden to put my pool-noodled trampoline in.