Belgravia House in London by Todhunter Earle. Even though this is a rooftop garden, the design show would be excellent for any long, narrow yard. Great way to break up the space by making different "zones"!
Don't underestimate perennials in making your gardening life easier. Perennials will continue to come back every year and will only require minimal maintenance such as weeding and fertilizing. You'll save time by not having to plant and care for seedlings