The prayers some people do before bed are in a way making a suggestion to the subconscious from the conscious mind. If you misplaced something & cannot find it while awake it may help to ask the over 90% of your mind in your subconscious for the answer....IDK if your conscious can control what your subconscious dreams of..but it is open to suggestion more so upon going to sleep & awakening
There is such a thing as lucid dreaming which is when you know you are in a dream and you can do whatever you want with it. There are tips on how to lucid dream on youtube. However, your mind will still be hazy so don't expect yourself to remember to meet your favorite celebrity since you will probably forget.
Such a dream is called a 'lucid dream'. And its damn awesome. I have had it many times. Its like living the way you like, and living in a dream in your own way is much more easy and enjoyable than sometimes in real life. Its like making a film!