As for general curb appeal, either getting rid of the hedges that are there (definitely the juniper if the ones on the side are juniper) or pruning/cleaning up; and putting in a curved border that winds around the front of the house where the hedges/plants are, and all along the walkway down the driveway, so that it is separating the grass from an area where you can put new plants/flowers. Mulch and put new plants/flowers in. Maybe make the border out of brick, as that would match the house nicely. That alone would make a huge difference, and it's cheap and easy. :-)

I would stick with white windows. They are more versatile in case you do not always have black shutters. I agree with Satix....you need updated landscaping. That will have far more impact on your curb appeal than any paint color.

i would change your door color. When you repaint it be sure to paint the sidelight, door, and trim all the same color. I might consider a medium gray for the door.