I was looking on the site for something else when I saw this, just joined so I could reply. First, I think the shop needs some paint to cut down on the contrast-the light color makes it stand out against the dark green background of your mature trees. Medium to coffee brown, I think, or a dove gray; both of those will disappear into our NW winters. I think the man door needs an arbor or pergola, in 4x or 6x cedar: this will make a visual break that in the photo angle makes both wall planes 'run together.' I can't tell if that is a gas meter next to the roll-up; if it is, it will make it difficult to plant any screening over there. If you CAN plant, I'd make two island beds (think kidney-shaped or generally irregular) to each side of the roll-up, about 8 -10' off the building, and a gap between them. To the right, a red-leafed Japanese maple. They'll have 5-8 footers at Home Depot soon, and in a few years it'll get 12-15' high and wide and screen that entire wall volume. On the left, an Alaska cedar (sometimes called yellow cedar or Nootka), they will get 20 feet tall or more but only 4-6' wide. This'll leave plenty of access to your rollup. They have these at the Depot too, about $29. You don't need a landscape plan, just use this simple rule: 'Tall thing, short thing, round thing, rock.' Repeat, making interlocking irregular triangles both vertically and horizontally. Think rhodies, azalea, small juniper and such. Leave lots of room for your wife to plant bulbs. You're not in the city (Woodinville? May Valley?), so another, later part of your plan could include a vegetable/herb garden with seating area and firepit to the left in the photo, where the bare-ish soil is…this will again soften the long wall and the fence you'll have to have to keep the deer out will help too. Tell your wife you are going to espalier fruit trees along that wall…she'll thing you are a genius. Get to work, my friend!