I sketched this up based on aerial photos (though I promise the real walls are straight).
And here's a first attempt at filling it in:
From the front door, I'm thinking of adding a walkway (probably not round stones, those just sketched easily) to a sitting area. A small dogwood tree can give this spot a bit more privacy, and would also be visible from my bedroom window. I lined all the pavement with small plants: labeled as Sweet Alyssum, but I think the Liriope muscari that
@csandt recommended might be a better fit, and have two zone-pushing edibles up against the house on either side of the driveway. I have a bunch of bulbs and bleeding hearts in the small garden.
They're not in the sketch, but I'd like to eventually put bulbs on the road side of the trees as well. Passers-by really can't see onto the property, so I want a little something for them, and that side gets good afternoon sun.