that's interesting, so all those times i've dreamt of celebrities, they were thinking of me too, i knew Andrew Francis felt the same lol.
seriously, it is a neat myth, i don't believe it 100% but i have heard of dream spells you can cast before bed so you dream of someone, you make them dream of you, or even your dream self entering their dreams [that one i think would be tricky] there's this manga i love, it's a series of one shot stories about a magic shop in the evening sky that can grant any wish in the world in exchange for something dear to you. well, the last story, the shop owner gave this girl 3 candies, each night before going to bed, she would think of someone she would want to be, and when she went to sleep, she would be that person in her crushes dreams, like a movie star for example. the point is, i've come across some interesting stories and idea's surrounding people meeting in dreams.
in regards to your cloud comment though, i have heard of people reading cloud formations to make predictions, normally though they involve the weather. my great gram taught me a lot of them. that fish scale one i never got, but i've always been able to tell when it will or won't rain thanks to her. if you feel you're able to predict the future with the clouds, try looking into it, every morning [or when you're off to school or something] look at the clouds, and try to write down three predictions. this tends to help people who are working on psychic abilities, might help you out in some way.