So my photoshopping skills are not great. If you really want something I cna probably do it up in paint.
Basically what I would do:
Left side of porch (1st pic). Get rid of the shrubs completely. Use mulch or bark chips there, and plant either a small flower bed with things such a crocuses, tulips, dafodils and some summer annuals (basically you just toss the seed there after the previous 3 are done blooming). You want things that will grow to be ~3/4 of the height of your porch. If that seems like way to much work, get a leafy groundcover or some Lilies of the Valley for there. Leafy will look much better in the smaller area than a needly ground cover.
Right on either side of your stairs, I would suggest a small evergreen tree. Similar to the one on the right side of the stairs, but smaller. Replace them when they grow to the height that the one you have currently is at.
For the right side of the house, assuming you want to keep it reasonably similar: Pull all of that out. The groundcover in fro the of the tree especially. Cut your lawn in further so that it matches the distance from porch to walkway as the left side of the walkway (but only in front of the evergreen tree, keep the area under the window the same square footage). In the area under the window, I would suggest going for small shrubs that don't go higher than the bottom of the window. I personally prefer leafy shrubs. In front of those, plant something a bit shorter, such as Hosta. Hosta will make the entire area look very leafy and full of life all spring/summer/early fall. Unless you have deer, which will eat them all. You can either mulch around that or plant a groundcover that matches the left side of the porch.
I would also suggest putting edging of some sort in. It really breaks up the lawn from the landscaping, and make everything appear neater. However, you will have to trim the lawn right next to it. If you're a really low maintenance kind of guy, skip the edging. I personally like bricks or cobbles, but you can do the cheaper black tubing too (it still does the job).
If you want, I can try to draw up some landscape plans for you.