I call these 'hobbies'.
From the kitchen: I use the plastic mayo jars with the screw off lids. Popsicle sticks make handy throw away glue applicators and they are also useful for pressing while paper piecing.
From the den: I like the wire mesh stackable trays for holding current quilt magazines. I have a sectioned mail holder for rulers.
From the closet: The hanging mesh organizers are highly functional and most of these have been mentioned.
From the laundry room: storing WIPs in baskets of course this is not for everyone. LOL
Thanks craftybear for starting these listings. :-)