Keep the garden vertical. That's why it's good to look for shrubs and trees that max out interest as they grow up, not out. Try dwarf varieties for a small backyard, as well as more columnar evergreens (bonus—they boost wintertime interest, too).
44 Small Backyard Landscape Designs to Make Yours Perfect
Tips on Build Small Backyard Landscaping Ideas: Cheapest Way To Build A Fence For Small Backyard Landscaping Ideas With Gravels And Lawn Also Landscape Border With Shrubs And Landscape Ideas For Small Yards Plus Garden Design With Outdoor Ideas