Here's a thread that might interest you, Memm:

http://www.dreamviews.com/induction-...technique.html

The key point there seems to be this:

The effectiveness of this technique really relies on your ability to mentally visualize a building or area, and the objects within it. This would be most effective if you can take note of a common area you are in your dreams. For instance, if you are a student who often times finds himself in school in his dream, then you should use your School as your memory palace for Dream Signs, and place the reminders there.

So, if you are going to your grandad's house regularly in dreams and say, go to the sink, you can place a "memory peg" at the sink - which could be something like a demon reminding you to ask yourself if you're dreaming and do an RC.