Personal Color Viewer®
i like this tool. We build new homes and also remodel...so it comes in handy. With this color viewer, you can play with color for the interior and exterior of the home. They have some examples, but you can upload your own photos of your room or home's exterior and then try different colors yourself.
You can also hire a landscape architect or design center as said above to come over for plantings and placements of boulders or ornaments...they can help you plan retaining walls if needed..etc.
You can also spiff up the exterior by changing or adding lighting, adding shutters if there are none or changing their style if you do... small things like building small pergolas or trellises...
on our home we took a sheet of white lattice, cut it out with an arch on top, screwed it to the house, and planted clematis to climb up it..that was 4 years ago and now it is lovely with flowers in the summer, and in the winter still looks nice.
Large Rocks/boulders and flowering trees are great assets to start with if diy...then fill in here and there with flowers & hosta.