Late in the original Zelda's second quest, I got stuck. I couldn't find the relocated and very well-hidden eighth dungeon. Then one night I had a dream in which I took a map of Hyrule and drew large circles around the other seven dungeons. Somehow I had figured that dungeons were probably not right beside each other, and so by sectioning off portions of the map, I could better find the missing dungeon in the blank areas. I woke up, drew the circles, found the dungeon. Zelda possessed me, and in those pre-internet, pre-FAQ days, my mind worked on it even while I slept.
I still dream about videogames. Sometimes Mario, sometimes the latest Civilization, sometimes nightmares brought on by Demon's Souls. But I don't dream about Zelda anymore.