We often neglect our walls when looking for storage, but they make for incredibly handy places to keep frequently used tools and other items. Loopits make it easy to store such items on your wall with hardly any setup.
Loopits come with two primary pieces: bands and discs. Discs mount to your walls with a screw and then you stretch a band around them. The bands, stretched tight, can hold all sorts of stuff. You could even use one to hold a sponge in the sink or items in the shower. We'd like to see a version that requires no screws and works with suction or adhesive, but they still serve as a simple way to add wall storage with minimal effort.
Loopits ($US16 for six discs and six bands) [Quirky]