OK, this idea is a little silly, but man has it been effective for me.
I actually somewhat owe the idea to Sara (if she's reading). I make mental notes of cool ideas I read in journals. I was impressed by her method of finding a beach (don't go looking for it, listen for it and head that way). The clever thing here is you have an intention but you're letting the dream drive its manifestation.
I had made it a point to conjure a friend of mine. Many of my dreams start in my house. My goal was to conjure him and head in the backyard where I would yell out for him (e.g. "S, where are you, I know you're back here somewhere). Sure enough he appeared from a particular location. Conjuring him or other DC's played out the same way and always from the same location. Hmmmm, what is my mind saying?
Well if DC's can enter my yard via the portal, then certainly I go leave it.
This has worked quite well for me. It's such a trip to stand in one location and look into a portal that leads to a completely different scene.
This technique can be modified in various ways. The crux of the technique is finding where DC's appear and leveraging that physical location in your dreamspace to visit different locations. I'll bet this works for other people as well. Give it a shot!