Organize cleaning supplies under the kitchen sink with built in drawer organizers. Can also use same idea with beauty supplies in the bathroom. I like this drawer cause it's more childproof than cupboards.
Hidden Jewelry Holder - This is an awesome DIY project. All you need is a couple nails, some hinges a little bit of altering and a place to hang a pretty picture. I think it's a good idea, and a convenient way to hide your valuables.