This is a real favorite of mine in concept: We use fold doors all along the kitchen counter and they open to porch where we place either a counter or counter-level narrow table and add stools for guests (who normally get in way hanging around kitchen island). It is a level pass-through as well and effectively adds counter space to kitchen. (COOL!)
Summer Planters. Plant flowers in large planters among bushes. Large iron accent pieces in the garden. Obelisk-type pieces look great!