Replace a pantry door with a screen door! For an even bigger impact, paint it a cheerful hue (try Byte Blue by Sherwin-Williams). The small surface area requires only a sample-size pot of paint to get the job done.
Window shelf! This kitchen has all the things that I love in it: pressed tin (I would love to have that as ceiling tile or a back splash), a farmhouse sink, salvaged leaded-glass windows used as art, cup-style drawer pulls, the color red, white cabinets, baskets....oh, my!!