That can be easier to say than it is to actually DO, though (a great example is the gorgeous-but technically challenging--indoor "tree" (pictured at left).
So how can a thrifty (and realistic) DIY-er accomplish this look?
Just like the outdoors itself...keep it simple.
Look for (or create for yourself) accessories that give your space a rustic feel, without being overwhelming. This antler wall hanging (pictured at right) is a great example.
In fact, one rustic piece, integrated in even the most traditional or even high-tech design, such as the kitchen pictured at left, can give any room a dash of the outdoors.
Whatever you do, make sure it fits your general style, whether that is bold, understated, quirky, or luxurious.