In my kitchen, a quick helpful tool I like to use is a Lazy Susan. It makes quickly accessing things I use for cooking a breeze. Just one spin, and I get the flavor olive oil or vinegar I want without knocking down multiple bottles or having to take front ones out of the cabinet.
I also use this helpful invention in my Home Office for craft markers
Rubbermaid makes a version of this type of turntable here.
Does anyone else use these great inventions in their house?