Probably the easiest way to DEILD is to remember the dream you just woke from, and imagine yourself back in it. This tends to work better than trying to invent a new scene.

Also, when you wake up in deep REM you're in pretty close contact with the subconscious. It's a good time to ask it for something you want to dream about. Example "Can I dream about flying?"

Try it... you just might find yourself flying in a lot of dreams afterwards.