Preping for Lucidity

Just read a portion of a book called "The Future of the Mind" by Michio Kaku that I found interesting. He states "...some dreams can incorporate events that happened a few hours earlier, just before sleep. But dreams mostly incorporate memories that are a few days old. For example, experiments have shown that if you put rose-colored glasses on a person, it takes a few days before dreams become rose-colored as well". The thing that I was not aware of was that it could take several days to incorporate things into dreams. Seems to me that some enterprising individuals out there could use this information to develop ways to better prep for lucidity.