Sneak Beer on the Beach by Hiding It in a Soda Cup...You didn't hear it from us, but if you place a beer can in a big soda cup with a lid, you can sneak a beverage on a beach that doesn't allow it...and you can ice it!
Turn AA batteries into C cells and D cells-- Just wrap some cardboard around the AA battery so it's the right diameter. They are already the same height. Wrap cardboard strips and fasten w/ tape or rubber bands. New rechargeable AA batteries have plenty of power to run devices that used to require the bigger batteries. I've seen commercial C and D cell batteries that are merely AA batteries with a plastic tube around them to bulk them up.
21 Things Your Burglar Won’t Tell You! Put your car keys by your bed at night. If you hear someone breaking in, just push the panic button on your key fob. All the neighbors will hear. Lots of good ideas to keep safe in this post. Great links to emergency preparedness too