But we can combat the mess and save space, through creativity...
These steps are no Instructables, but presentations of various installations I made in this topic, to (maybe) give you some ideas.
Step 1: A Computer in the Shelf
Step 2: A Nokia 770 in the Kitchen
This Nokia 770 wifi tablet is mounted inside a sliding trapdoor under a kitchen shelf.
Step 3: A Sliding Panel for Brooms and Umbrellas
A bottle filled with water, in a bag, gives the force to pull it back.
The umbrellas holder is made of a sawed plastic box.