Create a natural-appearing landscape by emphasizing the natural contour of the hillside. Build paths that follow natural ridges or valleys or that draw the eye to waterways. Choose darker materials that will retain heat longer if cold nights are a problem.
Plant trees or tall hedges to define a landscaped area. Create private views by placing tall plants at the edge of the space that is farthest from your home. Encourage public views from the bottom of the hill by using the tallest plants at the top.
Seed large open spaces with wildflowers to create a simulated meadow. Plant shade-tolerant, moisture-loving plants such as hostas if your north-facing hill borders a woodland.
Plant spreading ground covers on very steep hillsides. Mowing a steep hillside can be virtually impossible. Plants like English ivy and crown vetch will fill the space quickly with low-maintenance cover.