Expandable Over The Sink Shelf--got a bamboo version of this. Really makes a big different in the kitchen and in the small space we have. Wish I had purchased a prettier one---like this one--but what I got gets the job done. Plus, we have a small pull-out basket for sponges and such with ours, so I can't complain THAT much!
Mason jar air freshener - fill a small mason jar about 1/4 full with baking soda, and add 6-8 drops of your favorite essential oil. Punch holes in the lid, and place in any spot that could use some freshening. Every once in a while, give the jar a gentle shake to boost it's air freshening power.