Thread: Creating your own dreamsign?

I read this book by Robert Waggoner called Lucid Dreaming: Gateway to the inner self. It's a really fun book to read especially the joy he describes of getting lucid. But I noticed that he creates his own dreamsign. Every night before going to bed he looked at his hands for a couple of minutes telling himself that if he would see his hands he would recognise he was dreaming. After a few days his hands started to pop up in his dream. Is this something that would work and are there others who do a similar thing?