There is a truth that what we think, the thought patterns and associated emotional states, does in fact have a direct influence on what happens to us. If you think you're an unattractive and unlovable person for instance, you will become that and create the environment for that to become a reality, confirming your fears. You made that happen. If you think positively, you'll act positively, and positive things happen. That's not rocket science.
But I don't think that is quite the same thing as imagining that I think someone is going to knock on the door, that is going to happen. People imagine a thousand different things in the course of any give day, and that doesn't mean the magical quantum world will "quaff" these thoughts into actual things. I can't imagine a pink bunny rabbit in my mind, and then one suddenly drops out of a tree, which is where pink rabbits fly at night and keep their nests.