When you brought up Rapunzel I thought of the name Rapunzel; a flashback to a Golden Book, a cartoon picture of a tower, a prince, and a redhead with long hair; Drew Barrymore (tangent); Fractured Fairy Tales from the Bullwinkle Show; and another tangent - Rumpelstilskin. That pretty much happened within a second or two and took some time to "remember" as I wrote. Hope that helped.
As for, thinking about "nothing" when someone is reading your mind - that is only going to work if they are reading surface thoughts.
Writing all your thoughts down seems to me to be pretty much impossible. I would just go with the high points.