I actually have become quite knowledgeable on the subject.. me and jordan from spirit science. I can Pretty much close my eyes and just GO places and see things.. and my dreams are always like REALLY vivid now.. I dunno I just sorta notice all my skills keep getting finer toned. I don't just see the past anymore, I can actually FEEL what it was like too.
On the subject of creating things with your mind - think of all reality like one giant consciousness grid that time does not apply to. When you think of shit, it can actually be happening somewhere.. another parallel time, past present future.. it all just either gets pulled from somewhere or the thought itself makes it exist.. not here.. but somewhere. That empty space inside your mind where shit just seems to exist? Yeah it's like a little pocket in the universe where you're just endlessly creating shit.
in short, nothing you think is stupid, and nothing you think is fake. You make your own reality, and sometimes help in making others too :P