Yes, a rule of thumb is to remember to look at your hands in a dream. You even may look at them in reality (or "reality") to get a habit. After you look at hands in a dream you remember that you in a dream. Next difficult thing is to be able not to ruin a dream and to try to explore it. I constantly tried to go through walls in my room or to fly - no success :) Also it is possible to keep attention at the period when you're go from reality to a dream. It feels like your body made of a stone and you can't move and then you're in a dream.
