Wonderful ideas to make your sloped backyard gorgeous!
Conquer slopes and create a beautiful yard with landscape walls.
Build Landscape Walls and Keep Them in Tip-Top Shape from BHG--good info
Create a Dooryard Garden Like a welcome mat to a visitor, the design, scale, planting, and maintenance around your home's entry help determine whether the arrival is a pleasing one.
This one has a good video attached
10 Stunning Landscape Ideas for a Sloped Yard