When you try to look at a dream, try to look at it logically: "This is my imagination. If I can do it when I'm not asleep I can do it now as well." That is usually enough to jumpstart me. Although, because focus is a hard thing to attain at first, things might go wrong because you were too deep in the moment. To quote Max Payne, "...but dreams have a nasty habit of going bad when you're not looking."